Ben Kraft
c6d087c29b
## Summary:
One common use of fragment spreads is as the entirety of a field's
selection, e.g.
```graphql
query MyQuery {
myField {
...MyFragment
}
}
```
In this case, by default, genqlient generates a wrapper type
`MyQueryMyFieldMyType`, which just embeds `MyFragment`. This makes
sense if you later want to add more fields in addition to the fragment
spread. But if you don't -- and you did the fragment because you want
to share types, it's an extra layer of indirection. (Which becomes
especially onerous if `myField` has list type (`[MyType!]`), such that
it's not just an extra attribute-access to get to `MyFragment`.)
The new option `# @genqlient(flatten: true)` simplifies this situation:
if applied to `myField` is skips the wrapper type;
`MyQueryResponse.MyField` will simply have type `MyFragment` (or
`[]MyFragment`, or whatever). This should hopefully make the `typename`
option, which has more limitations, less necessary.
Note that in #30 the initial idea was to support this for fields as
well. This would require significant additional complexity in the
JSON-(un)marshaling code, and has proven less necessary, so I
implemented this option only for fragment-spreads for now. With that
restriction, it was shockingly simple; we have to hook into a bunch of
different places, but they're all quite simple, since the structure of
the Go types still matches the structure in GraphQL.
Issue: https://github.com/Khan/genqlient/issues/30
## Test plan:
make check
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/121
145 lines
3.3 KiB
Go
145 lines
3.3 KiB
Go
package server
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import (
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"context"
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"fmt"
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"net/http/httptest"
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"github.com/99designs/gqlgen/graphql/handler"
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"github.com/99designs/gqlgen/graphql/handler/transport"
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)
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func strptr(v string) *string { return &v }
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func intptr(v int) *int { return &v }
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var users = []*User{
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{
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ID: "1", Name: "Yours Truly", LuckyNumber: intptr(17),
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Birthdate: strptr("2025-01-01"),
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Hair: &Hair{Color: strptr("Black")},
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},
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{ID: "2", Name: "Raven", LuckyNumber: intptr(-1), Hair: nil},
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}
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func init() {
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users[0].Friends = []*User{users[1]} // (obviously a lie, but)
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users[1].Friends = users // try to crash the system
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}
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var animals = []*Animal{
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{
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ID: "3", Name: "Fido", Species: SpeciesDog, Owner: userByID("1"),
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Hair: &BeingsHair{HasHair: true},
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},
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{
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ID: "4", Name: "Old One", Species: SpeciesCoelacanth, Owner: nil,
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Hair: &BeingsHair{HasHair: false},
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},
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}
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func userByID(id string) *User {
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for _, user := range users {
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if id == user.ID {
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return user
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}
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}
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return nil
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}
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func usersByBirthdates(dates []string) []*User {
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var retval []*User
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for _, date := range dates {
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for _, user := range users {
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if user.Birthdate != nil && *user.Birthdate == date {
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retval = append(retval, user)
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}
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}
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}
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return retval
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}
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func beingByID(id string) Being {
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for _, user := range users {
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if id == user.ID {
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return user
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}
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}
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for _, animal := range animals {
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if id == animal.ID {
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return animal
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}
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}
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return nil
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}
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func (r *queryResolver) Me(ctx context.Context) (*User, error) {
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return userByID("1"), nil
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}
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func (r *queryResolver) User(ctx context.Context, id *string) (*User, error) {
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if id == nil {
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return userByID("1"), nil
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}
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return userByID(*id), nil
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}
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func (r *queryResolver) Being(ctx context.Context, id string) (Being, error) {
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return beingByID(id), nil
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}
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func (r *queryResolver) Beings(ctx context.Context, ids []string) ([]Being, error) {
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ret := make([]Being, len(ids))
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for i, id := range ids {
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ret[i] = beingByID(id)
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}
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return ret, nil
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}
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func (r *queryResolver) LotteryWinner(ctx context.Context, number int) (Lucky, error) {
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for _, user := range users {
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if user.LuckyNumber != nil && *user.LuckyNumber == number {
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return user, nil
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}
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}
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return nil, nil
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}
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func (r *queryResolver) UsersBornOn(ctx context.Context, date string) ([]*User, error) {
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return usersByBirthdates([]string{date}), nil
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}
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func (r *queryResolver) UsersBornOnDates(ctx context.Context, dates []string) ([]*User, error) {
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return usersByBirthdates(dates), nil
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}
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func (r *queryResolver) UserSearch(ctx context.Context, birthdate *string, id *string) ([]*User, error) {
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switch {
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case birthdate == nil && id != nil:
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return []*User{userByID(*id)}, nil
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case birthdate != nil && id == nil:
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return usersByBirthdates([]string{*birthdate}), nil
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default:
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return nil, fmt.Errorf("need exactly one of birthdate or id")
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}
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}
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func (r *queryResolver) Fail(ctx context.Context) (*bool, error) {
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f := true
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return &f, fmt.Errorf("oh no")
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}
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func RunServer() *httptest.Server {
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gqlgenServer := handler.New(NewExecutableSchema(Config{Resolvers: &resolver{}}))
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gqlgenServer.AddTransport(transport.POST{})
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return httptest.NewServer(gqlgenServer)
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}
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type (
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resolver struct{}
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queryResolver struct{}
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)
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func (r *resolver) Query() QueryResolver { return &queryResolver{} }
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//go:generate go run github.com/99designs/gqlgen
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