## Summary:
There were a few bugs here, one of which Craig came across when pulling
the custom-unmarshaler change into webapp:
1. If you have an optional field with a custom unmarshaler, and the
server omits the field from the response entirely (i.e. does not
write `"myField": null`), we would still call your unmarshaler with
an input of `[]byte(nil)`. This is just wrong; it's our job to do
the nil-check. (This is the one Craig found; in practice gqlgen
servers do not do this and I think the spec says not to although it's
a bit fuzzy on the matter of serialization. But in practice we have
mocks that do it -- for required fields even! -- and it seems better
to handle it than pass you data on which you'll probably err or even
panic.)
2. If you have an optional field with a custom unmarshaler, and the
server returns an explicit null (i.e. `"myField": null`), we would
call your unmarshaler with `[]byte("null")`. In principle the intent
was you're supposed to implement that, as [`json.Unmarshaler`
advises][1]. But (a) I forgot to document that, and (b) in practice
`json.Unmarshal` [does *not* call you in that case][2], i.e. its
advice is unnecessary. So I think it's better for us to just match
it, and not call you. (And in that case I see no reason to bother
documenting the advice.)
3. If you have an optional, `pointer: true` field with a custom
marshaler, the reverse of (2) applies: if the pointer is nil, we
shouldn't really call you. (Indeed if you were a real
`json.Marshaler` with a value-method rather than a pointer-method,
trying to call you might panic!) Note we don't need to explicitly
write "null"; we just leave the `json.RawMessage` as nil, and
`json.Marshal` [handles that][3].
4. We handle interface types effectively the same as custom
unmarshalers, just we generate the unmarshaler. So if you have an
optional field with interface type, (1) would also apply there; our
generated unmarshaler returns an error in this case.
5. While (2) doesn't apply to such optional interface fields (because we
do the customary `if string(b) == "null"` check -- this I at least
thought to test), if you set `pointer: true` on the field, we would
still call the unmarshaler on the value, and it would no-op, but only
*after* we initialized the pointer. Put more simply, we'd return a
non-nil pointer to nil interface, rather than a nil pointer; this is
wrong since the whole point of `pointer: true` is you only get a
non-nil pointer if your value is nil! Of course, in practice there's
little reason to use `pointer: true` on interface fields, and indeed
this stuff gets so confusing my test was even wrong.
In this commit I fix all the bugs, by adding appropriate nil-checks to
wrap the unmarshaler-calls. The templates are, as always, a bit
confusing, but the generated code makes it clear what changed.
Note we'll want to land this before cutting a release with custom
marshaler/unmarshaler support, because the first three bugs are
potentially quite noticeable. (The latter two are in `v0.1.0`, but
presumably quite rare.)
[1]: https://pkg.go.dev/encoding/json#Unmarshaler
[2]: https://play.golang.org/p/Pw6zNN8trGO
[3]: https://play.golang.org/p/crTfnT7ePte
Issue: https://phabricator.khanacademy.org/D74453#inline-558571
## Test plan:
make tesc
Author: benjaminjkraft
Reviewers: csilvers, StevenACoffman, benjaminjkraft, aberkan, dnerdy, jvoll, mahtabsabet, MiguelCastillo
Required Reviewers:
Approved By: csilvers, StevenACoffman
Checks: ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Lint, ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Lint
Pull Request URL: https://github.com/Khan/genqlient/pull/116
476 lines
18 KiB
Go
476 lines
18 KiB
Go
package test
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// Code generated by github.com/Khan/genqlient, DO NOT EDIT.
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import (
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"encoding/json"
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"fmt"
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"github.com/Khan/genqlient/graphql"
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"github.com/Khan/genqlient/internal/testutil"
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)
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// InterfaceNoFragmentsQueryRandomItemArticle includes the requested fields of the GraphQL type Article.
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type InterfaceNoFragmentsQueryRandomItemArticle struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryRandomItemContent includes the requested fields of the GraphQL interface Content.
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//
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// InterfaceNoFragmentsQueryRandomItemContent is implemented by the following types:
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// InterfaceNoFragmentsQueryRandomItemArticle
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// InterfaceNoFragmentsQueryRandomItemVideo
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// InterfaceNoFragmentsQueryRandomItemTopic
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// The GraphQL type's documentation follows.
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//
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// Content is implemented by various types like Article, Video, and Topic.
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type InterfaceNoFragmentsQueryRandomItemContent interface {
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implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemContent()
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// GetTypename returns the receiver's concrete GraphQL type-name (see interface doc for possible values).
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GetTypename() string
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// GetId returns the interface-field "id" from its implementation.
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// The GraphQL interface field's documentation follows.
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//
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// ID is the identifier of the content.
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GetId() testutil.ID
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// GetName returns the interface-field "name" from its implementation.
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GetName() string
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}
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func (v *InterfaceNoFragmentsQueryRandomItemArticle) implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemArticle) GetTypename() string { return v.Typename }
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemArticle) GetId() testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemArticle) GetName() string { return v.Name }
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func (v *InterfaceNoFragmentsQueryRandomItemVideo) implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemVideo) GetTypename() string { return v.Typename }
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemVideo) GetId() testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemVideo) GetName() string { return v.Name }
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func (v *InterfaceNoFragmentsQueryRandomItemTopic) implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemTopic) GetTypename() string { return v.Typename }
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemTopic) GetId() testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemContent.
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func (v *InterfaceNoFragmentsQueryRandomItemTopic) GetName() string { return v.Name }
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func __unmarshalInterfaceNoFragmentsQueryRandomItemContent(b []byte, v *InterfaceNoFragmentsQueryRandomItemContent) error {
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if string(b) == "null" {
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return nil
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}
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var tn struct {
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TypeName string `json:"__typename"`
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}
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err := json.Unmarshal(b, &tn)
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if err != nil {
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return err
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}
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switch tn.TypeName {
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case "Article":
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*v = new(InterfaceNoFragmentsQueryRandomItemArticle)
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return json.Unmarshal(b, *v)
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case "Video":
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*v = new(InterfaceNoFragmentsQueryRandomItemVideo)
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return json.Unmarshal(b, *v)
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case "Topic":
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*v = new(InterfaceNoFragmentsQueryRandomItemTopic)
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return json.Unmarshal(b, *v)
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case "":
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return fmt.Errorf(
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"Response was missing Content.__typename")
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default:
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return fmt.Errorf(
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`Unexpected concrete type for InterfaceNoFragmentsQueryRandomItemContent: "%v"`, tn.TypeName)
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}
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}
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// InterfaceNoFragmentsQueryRandomItemTopic includes the requested fields of the GraphQL type Topic.
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type InterfaceNoFragmentsQueryRandomItemTopic struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryRandomItemVideo includes the requested fields of the GraphQL type Video.
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type InterfaceNoFragmentsQueryRandomItemVideo struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle includes the requested fields of the GraphQL type Article.
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type InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameContent includes the requested fields of the GraphQL interface Content.
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//
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameContent is implemented by the following types:
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic
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// The GraphQL type's documentation follows.
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//
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// Content is implemented by various types like Article, Video, and Topic.
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type InterfaceNoFragmentsQueryRandomItemWithTypeNameContent interface {
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implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemWithTypeNameContent()
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// GetTypename returns the receiver's concrete GraphQL type-name (see interface doc for possible values).
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GetTypename() string
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// GetId returns the interface-field "id" from its implementation.
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// The GraphQL interface field's documentation follows.
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//
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// ID is the identifier of the content.
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GetId() testutil.ID
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// GetName returns the interface-field "name" from its implementation.
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GetName() string
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}
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle) implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemWithTypeNameContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle) GetTypename() string {
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return v.Typename
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}
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle) GetId() testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle) GetName() string { return v.Name }
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo) implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemWithTypeNameContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo) GetTypename() string {
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return v.Typename
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}
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo) GetId() testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo) GetName() string { return v.Name }
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic) implementsGraphQLInterfaceInterfaceNoFragmentsQueryRandomItemWithTypeNameContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic) GetTypename() string {
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return v.Typename
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}
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic) GetId() testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryRandomItemWithTypeNameContent.
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func (v *InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic) GetName() string { return v.Name }
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func __unmarshalInterfaceNoFragmentsQueryRandomItemWithTypeNameContent(b []byte, v *InterfaceNoFragmentsQueryRandomItemWithTypeNameContent) error {
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if string(b) == "null" {
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return nil
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}
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var tn struct {
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TypeName string `json:"__typename"`
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}
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err := json.Unmarshal(b, &tn)
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if err != nil {
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return err
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}
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switch tn.TypeName {
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case "Article":
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*v = new(InterfaceNoFragmentsQueryRandomItemWithTypeNameArticle)
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return json.Unmarshal(b, *v)
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case "Video":
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*v = new(InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo)
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return json.Unmarshal(b, *v)
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case "Topic":
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*v = new(InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic)
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return json.Unmarshal(b, *v)
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case "":
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return fmt.Errorf(
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"Response was missing Content.__typename")
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default:
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return fmt.Errorf(
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`Unexpected concrete type for InterfaceNoFragmentsQueryRandomItemWithTypeNameContent: "%v"`, tn.TypeName)
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}
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}
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic includes the requested fields of the GraphQL type Topic.
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type InterfaceNoFragmentsQueryRandomItemWithTypeNameTopic struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo includes the requested fields of the GraphQL type Video.
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type InterfaceNoFragmentsQueryRandomItemWithTypeNameVideo struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryResponse is returned by InterfaceNoFragmentsQuery on success.
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type InterfaceNoFragmentsQueryResponse struct {
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Root InterfaceNoFragmentsQueryRootTopic `json:"root"`
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RandomItem InterfaceNoFragmentsQueryRandomItemContent `json:"-"`
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RandomItemWithTypeName InterfaceNoFragmentsQueryRandomItemWithTypeNameContent `json:"-"`
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WithPointer *InterfaceNoFragmentsQueryWithPointerContent `json:"-"`
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}
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func (v *InterfaceNoFragmentsQueryResponse) UnmarshalJSON(b []byte) error {
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if string(b) == "null" {
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return nil
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}
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var firstPass struct {
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*InterfaceNoFragmentsQueryResponse
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RandomItem json.RawMessage `json:"randomItem"`
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RandomItemWithTypeName json.RawMessage `json:"randomItemWithTypeName"`
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WithPointer json.RawMessage `json:"withPointer"`
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graphql.NoUnmarshalJSON
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}
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firstPass.InterfaceNoFragmentsQueryResponse = v
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err := json.Unmarshal(b, &firstPass)
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if err != nil {
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return err
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}
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{
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dst := &v.RandomItem
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src := firstPass.RandomItem
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if len(src) != 0 && string(src) != "null" {
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err = __unmarshalInterfaceNoFragmentsQueryRandomItemContent(
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src, dst)
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if err != nil {
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return fmt.Errorf(
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"Unable to unmarshal InterfaceNoFragmentsQueryResponse.RandomItem: %w", err)
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}
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}
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}
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{
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dst := &v.RandomItemWithTypeName
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src := firstPass.RandomItemWithTypeName
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if len(src) != 0 && string(src) != "null" {
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err = __unmarshalInterfaceNoFragmentsQueryRandomItemWithTypeNameContent(
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src, dst)
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if err != nil {
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return fmt.Errorf(
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"Unable to unmarshal InterfaceNoFragmentsQueryResponse.RandomItemWithTypeName: %w", err)
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}
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}
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}
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{
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dst := &v.WithPointer
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src := firstPass.WithPointer
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if len(src) != 0 && string(src) != "null" {
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*dst = new(InterfaceNoFragmentsQueryWithPointerContent)
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err = __unmarshalInterfaceNoFragmentsQueryWithPointerContent(
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src, *dst)
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if err != nil {
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return fmt.Errorf(
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"Unable to unmarshal InterfaceNoFragmentsQueryResponse.WithPointer: %w", err)
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}
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}
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}
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return nil
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}
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// InterfaceNoFragmentsQueryRootTopic includes the requested fields of the GraphQL type Topic.
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type InterfaceNoFragmentsQueryRootTopic struct {
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// ID is documented in the Content interface.
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Id testutil.ID `json:"id"`
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Name string `json:"name"`
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}
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// InterfaceNoFragmentsQueryWithPointerArticle includes the requested fields of the GraphQL type Article.
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type InterfaceNoFragmentsQueryWithPointerArticle struct {
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Typename string `json:"__typename"`
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// ID is the identifier of the content.
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Id *testutil.ID `json:"id"`
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Name *string `json:"name"`
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}
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// InterfaceNoFragmentsQueryWithPointerContent includes the requested fields of the GraphQL interface Content.
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//
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// InterfaceNoFragmentsQueryWithPointerContent is implemented by the following types:
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// InterfaceNoFragmentsQueryWithPointerArticle
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// InterfaceNoFragmentsQueryWithPointerVideo
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// InterfaceNoFragmentsQueryWithPointerTopic
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// The GraphQL type's documentation follows.
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//
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// Content is implemented by various types like Article, Video, and Topic.
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type InterfaceNoFragmentsQueryWithPointerContent interface {
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implementsGraphQLInterfaceInterfaceNoFragmentsQueryWithPointerContent()
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// GetTypename returns the receiver's concrete GraphQL type-name (see interface doc for possible values).
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GetTypename() string
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// GetId returns the interface-field "id" from its implementation.
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// The GraphQL interface field's documentation follows.
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//
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// ID is the identifier of the content.
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GetId() *testutil.ID
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// GetName returns the interface-field "name" from its implementation.
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GetName() *string
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}
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func (v *InterfaceNoFragmentsQueryWithPointerArticle) implementsGraphQLInterfaceInterfaceNoFragmentsQueryWithPointerContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerArticle) GetTypename() string { return v.Typename }
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerArticle) GetId() *testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerArticle) GetName() *string { return v.Name }
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func (v *InterfaceNoFragmentsQueryWithPointerVideo) implementsGraphQLInterfaceInterfaceNoFragmentsQueryWithPointerContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerVideo) GetTypename() string { return v.Typename }
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerVideo) GetId() *testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerVideo) GetName() *string { return v.Name }
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func (v *InterfaceNoFragmentsQueryWithPointerTopic) implementsGraphQLInterfaceInterfaceNoFragmentsQueryWithPointerContent() {
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}
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// GetTypename is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerTopic) GetTypename() string { return v.Typename }
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// GetId is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerTopic) GetId() *testutil.ID { return v.Id }
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// GetName is a part of, and documented with, the interface InterfaceNoFragmentsQueryWithPointerContent.
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func (v *InterfaceNoFragmentsQueryWithPointerTopic) GetName() *string { return v.Name }
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func __unmarshalInterfaceNoFragmentsQueryWithPointerContent(b []byte, v *InterfaceNoFragmentsQueryWithPointerContent) error {
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if string(b) == "null" {
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return nil
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}
|
|
|
|
var tn struct {
|
|
TypeName string `json:"__typename"`
|
|
}
|
|
err := json.Unmarshal(b, &tn)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
switch tn.TypeName {
|
|
case "Article":
|
|
*v = new(InterfaceNoFragmentsQueryWithPointerArticle)
|
|
return json.Unmarshal(b, *v)
|
|
case "Video":
|
|
*v = new(InterfaceNoFragmentsQueryWithPointerVideo)
|
|
return json.Unmarshal(b, *v)
|
|
case "Topic":
|
|
*v = new(InterfaceNoFragmentsQueryWithPointerTopic)
|
|
return json.Unmarshal(b, *v)
|
|
case "":
|
|
return fmt.Errorf(
|
|
"Response was missing Content.__typename")
|
|
default:
|
|
return fmt.Errorf(
|
|
`Unexpected concrete type for InterfaceNoFragmentsQueryWithPointerContent: "%v"`, tn.TypeName)
|
|
}
|
|
}
|
|
|
|
// InterfaceNoFragmentsQueryWithPointerTopic includes the requested fields of the GraphQL type Topic.
|
|
type InterfaceNoFragmentsQueryWithPointerTopic struct {
|
|
Typename string `json:"__typename"`
|
|
// ID is the identifier of the content.
|
|
Id *testutil.ID `json:"id"`
|
|
Name *string `json:"name"`
|
|
}
|
|
|
|
// InterfaceNoFragmentsQueryWithPointerVideo includes the requested fields of the GraphQL type Video.
|
|
type InterfaceNoFragmentsQueryWithPointerVideo struct {
|
|
Typename string `json:"__typename"`
|
|
// ID is the identifier of the content.
|
|
Id *testutil.ID `json:"id"`
|
|
Name *string `json:"name"`
|
|
}
|
|
|
|
func InterfaceNoFragmentsQuery(
|
|
client graphql.Client,
|
|
) (*InterfaceNoFragmentsQueryResponse, error) {
|
|
var err error
|
|
|
|
var retval InterfaceNoFragmentsQueryResponse
|
|
err = client.MakeRequest(
|
|
nil,
|
|
"InterfaceNoFragmentsQuery",
|
|
`
|
|
query InterfaceNoFragmentsQuery {
|
|
root {
|
|
id
|
|
name
|
|
}
|
|
randomItem {
|
|
__typename
|
|
id
|
|
name
|
|
}
|
|
randomItemWithTypeName: randomItem {
|
|
__typename
|
|
id
|
|
name
|
|
}
|
|
withPointer: randomItem {
|
|
__typename
|
|
id
|
|
name
|
|
}
|
|
}
|
|
`,
|
|
&retval,
|
|
nil,
|
|
)
|
|
return &retval, err
|
|
}
|
|
|