## Summary: If your type implements an interface, we add getter methods for the shared fields, so that those may be accessed via the interface. But it turns out occasionally it's useful to have these getter methods when they don't implement a GraphQL interface, so you can use two genqlient-generated types in the same function if they have the same fields. (This comes up most often when you have a GraphQL union that maybe should really be an interface, or if you don't yet support interfaces implementing other interfaces (indeed our parser doesn't either). But one can imagine other use cases.) We can't predict how you want to do that, so we can't generate the interface, but we can generate the methods, so you can define the interface and do a type assertion from there. Since these methods are pretty simple to generate, we just do it always. (As with #120, if binary size becomes an issue we could later add an option to only generate methods that are truly needed but including them seems like the better default.) This also fixes a subtle and rare bug, which would have become much more common (indeed existing tests caught it). Specifically, if you have a query like ```graphql fragment FragmentOne on T { id } fragment FragmentTwo on T { id } query Q { f { # interface type T ...FragmentOne ...FragmentTwo } } ``` since both `FragmentOne` and `FragmentTwo` request some common field, say `id`, we generate a method `GetId` on each one. But since `FragmentOne` and `FragmentTwo` are both on `T`, we also include their interfaces in the interface we generate for the type of `f`, `QFT`. So `QFT` includes a method `GetId`. But on the implementations, the two methods conflict, and neither gets promoted; this causes various code to fail to compile. With this change, this would have happened much more frequently -- even if only one of the two fragments is on `T`, as long as both request the field. Anyway, we now generate explicit methods on each struct for all of its recursively emebedded fields -- using the logic from #120 to compute them -- so that we don't need to rely on method-promotion. ## Test plan: make tesc Author: benjaminjkraft Reviewers: csilvers, dnerdy, aberkan, jvoll, mahtabsabet, MiguelCastillo, StevenACoffman Required Reviewers: Approved By: csilvers, dnerdy 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/126
199 lines
5.5 KiB
Go
199 lines
5.5 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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// GetTypename returns UnionNoFragmentsQueryRandomLeafArticle.Typename, and is useful for accessing the field via an interface.
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func (v *UnionNoFragmentsQueryRandomLeafArticle) GetTypename() string { return v.Typename }
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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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// 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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func (v *UnionNoFragmentsQueryRandomLeafVideo) implementsGraphQLInterfaceUnionNoFragmentsQueryRandomLeafLeafContent() {
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}
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func __unmarshalUnionNoFragmentsQueryRandomLeafLeafContent(b []byte, v *UnionNoFragmentsQueryRandomLeafLeafContent) 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(UnionNoFragmentsQueryRandomLeafArticle)
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return json.Unmarshal(b, *v)
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case "Video":
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*v = new(UnionNoFragmentsQueryRandomLeafVideo)
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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 LeafContent.__typename")
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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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func __marshalUnionNoFragmentsQueryRandomLeafLeafContent(v *UnionNoFragmentsQueryRandomLeafLeafContent) ([]byte, error) {
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var typename string
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switch v := (*v).(type) {
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case *UnionNoFragmentsQueryRandomLeafArticle:
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typename = "Article"
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result := struct {
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TypeName string `json:"__typename"`
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*UnionNoFragmentsQueryRandomLeafArticle
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}{typename, v}
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return json.Marshal(result)
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case *UnionNoFragmentsQueryRandomLeafVideo:
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typename = "Video"
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result := struct {
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TypeName string `json:"__typename"`
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*UnionNoFragmentsQueryRandomLeafVideo
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}{typename, v}
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return json.Marshal(result)
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case nil:
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return []byte("null"), nil
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default:
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return nil, fmt.Errorf(
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`Unexpected concrete type for UnionNoFragmentsQueryRandomLeafLeafContent: "%T"`, v)
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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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// GetTypename returns UnionNoFragmentsQueryRandomLeafVideo.Typename, and is useful for accessing the field via an interface.
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func (v *UnionNoFragmentsQueryRandomLeafVideo) GetTypename() string { return v.Typename }
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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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// GetRandomLeaf returns UnionNoFragmentsQueryResponse.RandomLeaf, and is useful for accessing the field via an interface.
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func (v *UnionNoFragmentsQueryResponse) GetRandomLeaf() UnionNoFragmentsQueryRandomLeafLeafContent {
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return v.RandomLeaf
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}
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func (v *UnionNoFragmentsQueryResponse) 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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*UnionNoFragmentsQueryResponse
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RandomLeaf json.RawMessage `json:"randomLeaf"`
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graphql.NoUnmarshalJSON
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}
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firstPass.UnionNoFragmentsQueryResponse = 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.RandomLeaf
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src := firstPass.RandomLeaf
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if len(src) != 0 && string(src) != "null" {
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err = __unmarshalUnionNoFragmentsQueryRandomLeafLeafContent(
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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 UnionNoFragmentsQueryResponse.RandomLeaf: %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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type __premarshalUnionNoFragmentsQueryResponse struct {
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RandomLeaf json.RawMessage `json:"randomLeaf"`
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}
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func (v *UnionNoFragmentsQueryResponse) MarshalJSON() ([]byte, error) {
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premarshaled, err := v.__premarshalJSON()
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if err != nil {
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return nil, err
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}
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return json.Marshal(premarshaled)
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}
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func (v *UnionNoFragmentsQueryResponse) __premarshalJSON() (*__premarshalUnionNoFragmentsQueryResponse, error) {
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var retval __premarshalUnionNoFragmentsQueryResponse
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{
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dst := &retval.RandomLeaf
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src := v.RandomLeaf
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var err error
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*dst, err = __marshalUnionNoFragmentsQueryRandomLeafLeafContent(
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&src)
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if err != nil {
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return nil, fmt.Errorf(
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"Unable to marshal UnionNoFragmentsQueryResponse.RandomLeaf: %w", err)
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}
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}
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return &retval, 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 err 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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