## Summary:
Right now, if you make a query like `{ myInterface { field } }`, you
have to type-switch on all the possible implementations of `myInterface`
to get at `field`. Now, we generate getter-methods (e.g. `GetField`),
to make that access easier. Of course this only applies to shared
fields (which for now are the only ones, but once we support fragments
will no longer be).
This also includes a small change to the way we generate type-names for
interfaces: we no longer include the name of the concrete type in the
interface we propagate forward, so we generate
`MyInterfaceMyFieldMyType`, not `MyInterfaceMyImplMyFieldMyType`, in the
case where you have an interface `MyInterface` implemented by `MyImpl`
(and maybe other types) with field `myField: MyType`. This is necessary
so the getter method returns a well-defined type, and also probably
convenient for calling code. It will have to get a little bit more
complicated once we support fragments, where you could have two
implementing types with identically-named fields of different types, but
I think it'll be easiest to figure out how to deal with that when
implementing fragments.
While I was in the area, I added to the interface doc-comment a list of
the implementations. (In GraphQL, we're guaranteed to know them all
assuming our schema is up to date.)
Issue: https://github.com/Khan/genqlient/issues/8
## Test plan:
make check
Author: benjaminjkraft
Reviewers: benjaminjkraft, dnerdy, aberkan, MiguelCastillo
Required Reviewers:
Approved by: dnerdy
Checks: ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Test (1.13), ✅ Lint, ✅ Test (1.17), ✅ Test (1.16), ✅ Test (1.15), ✅ Test (1.14), ✅ Test (1.13), ✅ Lint
Pull request URL: https://github.com/Khan/genqlient/pull/57
127 lines
3.5 KiB
Go
127 lines
3.5 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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)
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// UnionNoFragmentsQueryRandomLeafArticle includes the requested fields of the GraphQL type Article.
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type UnionNoFragmentsQueryRandomLeafArticle struct {
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Typename string `json:"__typename"`
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}
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// UnionNoFragmentsQueryRandomLeafLeafContent includes the requested fields of the GraphQL interface LeafContent.
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//
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// UnionNoFragmentsQueryRandomLeafLeafContent is implemented by the following types:
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// UnionNoFragmentsQueryRandomLeafArticle
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// UnionNoFragmentsQueryRandomLeafVideo
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//
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// The GraphQL type's documentation follows.
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//
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// LeafContent represents content items that can't have child-nodes.
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type UnionNoFragmentsQueryRandomLeafLeafContent interface {
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implementsGraphQLInterfaceUnionNoFragmentsQueryRandomLeafLeafContent()
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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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}
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func (v *UnionNoFragmentsQueryRandomLeafArticle) implementsGraphQLInterfaceUnionNoFragmentsQueryRandomLeafLeafContent() {
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}
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// GetTypename is a part of, and documented with, the interface UnionNoFragmentsQueryRandomLeafLeafContent.
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func (v *UnionNoFragmentsQueryRandomLeafArticle) GetTypename() string { return v.Typename }
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func (v *UnionNoFragmentsQueryRandomLeafVideo) implementsGraphQLInterfaceUnionNoFragmentsQueryRandomLeafLeafContent() {
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}
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// GetTypename is a part of, and documented with, the interface UnionNoFragmentsQueryRandomLeafLeafContent.
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func (v *UnionNoFragmentsQueryRandomLeafVideo) GetTypename() string { return v.Typename }
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func __unmarshalUnionNoFragmentsQueryRandomLeafLeafContent(v *UnionNoFragmentsQueryRandomLeafLeafContent, m json.RawMessage) error {
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if string(m) == "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(m, &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(UnionNoFragmentsQueryRandomLeafArticle)
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return json.Unmarshal(m, *v)
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case "Video":
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*v = new(UnionNoFragmentsQueryRandomLeafVideo)
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return json.Unmarshal(m, *v)
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default:
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return fmt.Errorf(
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`Unexpected concrete type for UnionNoFragmentsQueryRandomLeafLeafContent: "%v"`, tn.TypeName)
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}
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}
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// UnionNoFragmentsQueryRandomLeafVideo includes the requested fields of the GraphQL type Video.
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type UnionNoFragmentsQueryRandomLeafVideo struct {
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Typename string `json:"__typename"`
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}
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// UnionNoFragmentsQueryResponse is returned by UnionNoFragmentsQuery on success.
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type UnionNoFragmentsQueryResponse struct {
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RandomLeaf UnionNoFragmentsQueryRandomLeafLeafContent `json:"-"`
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}
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func (v *UnionNoFragmentsQueryResponse) UnmarshalJSON(b []byte) error {
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type UnionNoFragmentsQueryResponseWrapper UnionNoFragmentsQueryResponse
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var firstPass struct {
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*UnionNoFragmentsQueryResponseWrapper
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RandomLeaf json.RawMessage `json:"randomLeaf"`
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}
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firstPass.UnionNoFragmentsQueryResponseWrapper = (*UnionNoFragmentsQueryResponseWrapper)(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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target := &v.RandomLeaf
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raw := firstPass.RandomLeaf
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err = __unmarshalUnionNoFragmentsQueryRandomLeafLeafContent(
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target, raw)
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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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return nil
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}
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func UnionNoFragmentsQuery(
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client graphql.Client,
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) (*UnionNoFragmentsQueryResponse, error) {
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var retval UnionNoFragmentsQueryResponse
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err := client.MakeRequest(
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nil,
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"UnionNoFragmentsQuery",
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`
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query UnionNoFragmentsQuery {
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randomLeaf {
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__typename
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}
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}
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`,
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&retval,
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nil,
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)
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return &retval, err
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}
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