Add @deprecated directive (#1008)

Author: ilslv

juniper/src/schema/model.rs

@@ -85,10 +85,14 @@ pub enum DirectiveLocation {
     Scalar,
     #[graphql(name = "FRAGMENT_DEFINITION")]
     FragmentDefinition,
+    #[graphql(name = "FIELD_DEFINITION")]
+    FieldDefinition,
     #[graphql(name = "FRAGMENT_SPREAD")]
     FragmentSpread,
     #[graphql(name = "INLINE_FRAGMENT")]
     InlineFragment,
+    #[graphql(name = "ENUM_VALUE")]
+    EnumValue,
 }
 
 impl<'a, QueryT, MutationT, SubscriptionT>
@@ -214,6 +218,10 @@ impl<'a, S> SchemaType<'a, S> {
             "include".to_owned(),
             DirectiveType::new_include(&mut registry),
         );
+        directives.insert(
+            "deprecated".to_owned(),
+            DirectiveType::new_deprecated(&mut registry),
+        );
         directives.insert(
             "specifiedBy".to_owned(),
             DirectiveType::new_specified_by(&mut registry),
@@ -545,6 +553,21 @@ where
         )
     }
 
+    fn new_deprecated(registry: &mut Registry<'a, S>) -> DirectiveType<'a, S>
+    where
+        S: ScalarValue,
+    {
+        Self::new(
+            "deprecated",
+            &[
+                DirectiveLocation::FieldDefinition,
+                DirectiveLocation::EnumValue,
+            ],
+            &[registry.arg::<String>("reason", &())],
+            false,
+        )
+    }
+
     fn new_specified_by(registry: &mut Registry<'a, S>) -> DirectiveType<'a, S>
     where
         S: ScalarValue,
@@ -570,10 +593,12 @@ impl fmt::Display for DirectiveLocation {
             DirectiveLocation::Mutation => "mutation",
             DirectiveLocation::Subscription => "subscription",
             DirectiveLocation::Field => "field",
+            DirectiveLocation::FieldDefinition => "field definition",
             DirectiveLocation::FragmentDefinition => "fragment definition",
             DirectiveLocation::FragmentSpread => "fragment spread",
             DirectiveLocation::InlineFragment => "inline fragment",
             DirectiveLocation::Scalar => "scalar",
+            DirectiveLocation::EnumValue => "enum value",
         })
     }
 }

juniper/src/tests/introspection_tests.rs

@@ -208,6 +208,13 @@ async fn test_introspection_directives() {
                         "INLINE_FRAGMENT",
                     ],
                 },
+                {
+                    "name": "deprecated",
+                    "locations": [
+                        "FIELD_DEFINITION",
+                        "ENUM_VALUE",
+                    ],
+                },
                 {
                     "name": "specifiedBy",
                     "locations": [

juniper/src/tests/schema_introspection.rs

@@ -1050,6 +1050,12 @@ pub(crate) fn schema_introspection_result() -> Value {
                   "isDeprecated": false,
                   "deprecationReason": null
                 },
+                {
+                  "name": "FIELD_DEFINITION",
+                  "description": null,
+                  "isDeprecated": false,
+                  "deprecationReason": null
+                },
                 {
                   "name": "FRAGMENT_SPREAD",
                   "description": null,
@@ -1067,6 +1073,12 @@ pub(crate) fn schema_introspection_result() -> Value {
                   "description": null,
                   "isDeprecated": false,
                   "deprecationReason": null
+                },
+                {
+                  "name": "ENUM_VALUE",
+                  "description": null,
+                  "isDeprecated": false,
+                  "deprecationReason": null
                 }
               ],
               "possibleTypes": null
@@ -1376,6 +1388,31 @@ pub(crate) fn schema_introspection_result() -> Value {
                 }
               ]
             },
+            {
+              "name": "deprecated",
+              "description": null,
+              "isRepeatable": false,
+              "locations": [
+                "FIELD_DEFINITION",
+                "ENUM_VALUE"
+              ],
+              "args": [
+                {
+                  "name": "reason",
+                  "description": null,
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "SCALAR",
+                      "name": "String",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ]
+            },
             {
               "name": "specifiedBy",
               "description": null,
@@ -2345,6 +2382,11 @@ pub(crate) fn schema_introspection_result_without_descriptions() -> Value {
                   "isDeprecated": false,
                   "deprecationReason": null
                 },
+                {
+                  "name": "FIELD_DEFINITION",
+                  "isDeprecated": false,
+                  "deprecationReason": null
+                },
                 {
                   "name": "FRAGMENT_SPREAD",
                   "isDeprecated": false,
@@ -2359,6 +2401,11 @@ pub(crate) fn schema_introspection_result_without_descriptions() -> Value {
                   "name": "SCALAR",
                   "isDeprecated": false,
                   "deprecationReason": null
+                },
+                {
+                  "name": "ENUM_VALUE",
+                  "isDeprecated": false,
+                  "deprecationReason": null
                 }
               ],
               "possibleTypes": null
@@ -2650,6 +2697,29 @@ pub(crate) fn schema_introspection_result_without_descriptions() -> Value {
                 }
               ]
             },
+            {
+              "name": "deprecated",
+              "isRepeatable": false,
+              "locations": [
+                "FIELD_DEFINITION",
+                "ENUM_VALUE"
+              ],
+              "args": [
+                {
+                  "name": "reason",
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "SCALAR",
+                      "name": "String",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ]
+            },
             {
               "name": "specifiedBy",
               "isRepeatable": false,