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How to configure gqlgen using gqlgen.yml
You are looking at the docs for an older version (v0.17.36). The latest version is v0.17.41.

gqlgen can be configured using a gqlgen.yml file, by default it will be loaded from the current directory, or any parent directory.


# Where are all the schema files located? globs are supported eg  src/**/*.graphqls
  - graph/*.graphqls

# Where should the generated server code go?
  layout: follow-schema
  dir: graph/generated
  package: generated

# Enable Apollo federation support
  filename: graph/federation.go
  package: graph

# Where should any generated models go?
  filename: graph/model/models_gen.go
  package: model
  # Optional: Pass in a path to a new gotpl template to use for generating the models
  # model_template: [your/path/model.gotpl]

# Where should the resolver implementations go?
  layout: follow-schema
  dir: graph
  package: graph
  filename_template: "{name}.resolvers.go"
  # Optional: turn on to not generate template comments above resolvers
  # omit_template_comment: false
  # Optional: Pass in a path to a new gotpl template to use for generating resolvers
  # resolver_template: [your/path/resolver.gotpl]

# Optional: turn on use ` + "`" + `gqlgen:"fieldName"` + "`" + ` tags in your models
# struct_tag: json

# Optional: turn on to use []Thing instead of []*Thing
# omit_slice_element_pointers: false

# Optional: turn on to omit Is<Name>() methods to interface and unions
# omit_interface_checks : true

# Optional: turn on to skip generation of ComplexityRoot struct content and Complexity function
# omit_complexity: false

# Optional: turn on to not generate any file notice comments in generated files
# omit_gqlgen_file_notice: false

# Optional: turn on to exclude the gqlgen version in the generated file notice. No effect if `omit_gqlgen_file_notice` is true.
# omit_gqlgen_version_in_file_notice: false

# Optional: turn off to make struct-type struct fields not use pointers
# e.g. type Thing struct { FieldA OtherThing } instead of { FieldA *OtherThing }
# struct_fields_always_pointers: true

# Optional: turn off to make resolvers return values instead of pointers for structs
# resolvers_always_return_pointers: true

# Optional: turn on to return pointers instead of values in unmarshalInput
# return_pointers_in_unmarshalinput: false

# Optional: wrap nullable input fields with Omittable
# nullable_input_omittable: true

# Optional: turn on to return pointers instead of values in unmarshalInput
# return_pointers_in_unmarshalinput: false

# Optional: set to speed up generation time by not performing a final validation pass.
# skip_validation: true

# Optional: set to skip running `go mod tidy` when generating server code
# skip_mod_tidy: true

# Optional: set to modify the initialisms regarded for Go names
# go_initialisms:
#   replace_defaults: false # if true, the default initialisms will get dropped in favor of the new ones instead of being added
#   initialisms: # List of initialisms to for Go names
#     - 'CC'
#     - 'BCC'

# gqlgen will search for any type names in the schema in these go packages
# if they match it will use them, otherwise it will generate them.
# autobind:
#   - "github.com/[YOUR_APP_DIR]/graph/model"

# This section declares type mapping between the GraphQL and go type systems
# The first line in each type will be used as defaults for resolver arguments and
# modelgen, the others will be allowed when binding to fields. Configure them to
# your liking
      - github.com/99designs/gqlgen/graphql.ID
      - github.com/99designs/gqlgen/graphql.Int
      - github.com/99designs/gqlgen/graphql.Int64
      - github.com/99designs/gqlgen/graphql.Int32
      - github.com/99designs/gqlgen/graphql.Int
      - github.com/99designs/gqlgen/graphql.Int64
      - github.com/99designs/gqlgen/graphql.Int32

Everything has defaults, so add things as you need.

Inline config with directives

gqlgen ships with some builtin directives that make it a little easier to manage wiring.

To start using them you first need to define them:

directive @goModel(
	model: String
	models: [String!]

directive @goField(
	forceResolver: Boolean
	name: String
  omittable: Boolean

directive @goTag(
	key: String!
	value: String

Here be dragons

gqlgen doesnt currently support user-configurable directives for SCALAR, ENUM, INTERFACE or UNION. This only works for internal directives. You can track the progress here

Now you can use these directives when defining types in your schema:

type User @goModel(model: "github.com/my/app/models.User") {
	id: ID! @goField(name: "todoId")
	name: String!
		@goField(forceResolver: true)
		@goTag(key: "xorm", value: "-")
		@goTag(key: "yaml")

The builtin directives goField, goModel and goTag are automatically registered to skip_runtime. Any directives registered as skip_runtime will not exposed during introspection and are used during code generation only.

If you have created a new code generation plugin using a directive which does not require runtime execution, the directive will need to be set to skip_runtime.

e.g. a custom directive called constraint would be set as skip_runtime using the following configuration

# custom directives which are not exposed during introspection. These directives are
# used for code generation only
    skip_runtime: true