/
introspection.ex
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/
introspection.ex
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defmodule Absinthe.Introspection do
@moduledoc """
Introspection support.
You can introspect your schema using `__schema`, `__type`, and `__typename`,
as [described in the specification](https://facebook.github.io/graphql/#sec-Introspection).
## Examples
Seeing the names of the types in the schema:
```
\"""
{
__schema {
types {
name
}
}
}
\"""
|> Absinthe.run(MyApp.Schema)
{:ok,
%{data: %{
"__schema" => %{
"types" => [
%{"name" => "Boolean"},
%{"name" => "Float"},
%{"name" => "ID"},
%{"name" => "Int"},
%{"name" => "String"},
...
]
}
}}
}
```
Getting the name of the queried type:
```
\"""
{
profile {
name
__typename
}
}
\"""
|> Absinthe.run(MyApp.Schema)
{:ok,
%{data: %{
"profile" => %{
"name" => "Joe",
"__typename" => "Person"
}
}}
}
```
Getting the name of the fields for a named type:
```
\"""
{
__type(name: "Person") {
fields {
name
type {
kind
name
}
}
}
}
\"""
|> Absinthe.run(MyApp.Schema)
{:ok,
%{data: %{
"__type" => %{
"fields" => [
%{
"name" => "name",
"type" => %{"kind" => "SCALAR", "name" => "String"}
},
%{
"name" => "age",
"type" => %{"kind" => "SCALAR", "name" => "Int"}
},
]
}
}}
}
```
(Note that you may have to nest several depths of `type`/`ofType`, as
type information includes any wrapping layers of [List](https://facebook.github.io/graphql/#sec-List)
and/or [NonNull](https://facebook.github.io/graphql/#sec-Non-null).)
"""
alias Absinthe.Type
# Determine if a term is an introspection type
@doc false
@spec type?(any) :: boolean
def type?(%Type.Object{name: "__" <> _}), do: true
def type?(_), do: false
end