Added basic implementation for #124

src/decorators/Metadata.ts

@@ -0,0 +1,27 @@
+import { getMetadataStorage } from "../metadata/getMetadataStorage";
+import { MethodAndPropDecorator } from "./types";
+
+export interface Metadata {
+  [index: string]: any;
+}
+
+export function Metadata(data: Metadata): ClassDecorator | MethodAndPropDecorator | any {
+  return (
+    targetOrPrototype: Function | Object,
+    propertyKey?: string | symbol,
+    descriptor?: any,
+  ): void => {
+    if (typeof targetOrPrototype === "function") {
+      getMetadataStorage().collectAdditionalObjectTypeMetadata({
+        target: targetOrPrototype,
+        data,
+      });
+    } else if (propertyKey !== undefined) {
+      getMetadataStorage().collectAdditionalFieldMetadata({
+        name: propertyKey,
+        target: targetOrPrototype.constructor,
+        data,
+      });
+    }
+  };
+}

src/metadata/definitions/class-metadata.ts

@@ -6,4 +6,5 @@ export interface ClassMetadata {
   fields?: FieldMetadata[];
   description?: string;
   interfaceClasses?: Function[];
+  metadata?: any;
 }

src/metadata/definitions/field-metadata.ts

@@ -15,4 +15,5 @@ export interface FieldMetadata {
   params?: ParamMetadata[];
   roles?: any[];
   middlewares?: Array<Middleware<any>>;
+  metadata?: any;
 }

src/metadata/definitions/index.ts

@@ -6,3 +6,4 @@ export * from "./middleware-metadata";
 export * from "./param-metadata";
 export * from "./resolver-metadata";
 export * from "./union-metadata";
+export * from "./metadata";

src/metadata/definitions/metadata.ts

@@ -0,0 +1,5 @@
+export interface Metadata {
+  data: any;
+  target: Function;
+  name?: string | symbol;
+}

src/metadata/metadata-storage.ts

@@ -1,25 +1,26 @@
+import { NoExplicitTypeError } from "../errors";
+import { ClassType } from "../interfaces";
 import {
-  ResolverMetadata,
-  ClassMetadata,
-  FieldMetadata,
-  ParamMetadata,
-  FieldResolverMetadata,
   AuthorizedMetadata,
   BaseResolverMetadata,
+  ClassMetadata,
   EnumMetadata,
-  UnionMetadata,
-  UnionMetadataWithSymbol,
+  FieldMetadata,
+  FieldResolverMetadata,
+  Metadata,
+  MiddlewareMetadata,
+  ParamMetadata,
   ResolverClassMetadata,
+  ResolverMetadata,
   SubscriptionResolverMetadata,
-  MiddlewareMetadata,
+  UnionMetadata,
+  UnionMetadataWithSymbol,
 } from "./definitions";
-import { ClassType } from "../interfaces";
-import { NoExplicitTypeError } from "../errors";
 import {
-  mapSuperResolverHandlers,
+  ensureReflectMetadataExists,
   mapMiddlewareMetadataToArray,
   mapSuperFieldResolverHandlers,
-  ensureReflectMetadataExists,
+  mapSuperResolverHandlers,
 } from "./utils";
 
 export class MetadataStorage {
@@ -28,6 +29,8 @@ export class MetadataStorage {
   subscriptions: SubscriptionResolverMetadata[] = [];
   fieldResolvers: FieldResolverMetadata[] = [];
   objectTypes: ClassMetadata[] = [];
+  additionalObjectTypeMetadata: Metadata[] = [];
+  additionalFieldMetadata: Array<Metadata & { name: string | Symbol }> = [];
   inputTypes: ClassMetadata[] = [];
   argumentTypes: ClassMetadata[] = [];
   interfaceTypes: ClassMetadata[] = [];
@@ -47,33 +50,43 @@ export class MetadataStorage {
   collectQueryHandlerMetadata(definition: ResolverMetadata) {
     this.queries.push(definition);
   }
+
   collectMutationHandlerMetadata(definition: ResolverMetadata) {
     this.mutations.push(definition);
   }
+
   collectSubscriptionHandlerMetadata(definition: SubscriptionResolverMetadata) {
     this.subscriptions.push(definition);
   }
+
   collectFieldResolverMetadata(definition: FieldResolverMetadata) {
     this.fieldResolvers.push(definition);
   }
+
   collectObjectMetadata(definition: ClassMetadata) {
     this.objectTypes.push(definition);
   }
+
   collectInputMetadata(definition: ClassMetadata) {
     this.inputTypes.push(definition);
   }
+
   collectArgsMetadata(definition: ClassMetadata) {
     this.argumentTypes.push(definition);
   }
+
   collectInterfaceMetadata(definition: ClassMetadata) {
     this.interfaceTypes.push(definition);
   }
+
   collectAuthorizedFieldMetadata(definition: AuthorizedMetadata) {
     this.authorizedFields.push(definition);
   }
+
   collectEnumMetadata(definition: EnumMetadata) {
     this.enums.push(definition);
   }
+
   collectUnionMetadata(definition: UnionMetadata) {
     const unionSymbol = Symbol(definition.name);
     this.unions.push({
@@ -82,16 +95,27 @@ export class MetadataStorage {
     });
     return unionSymbol;
   }
+
   collectMiddlewareMetadata(definition: MiddlewareMetadata) {
     this.middlewares.push(definition);
   }
 
   collectResolverClassMetadata(definition: ResolverClassMetadata) {
     this.resolverClasses.push(definition);
   }
+
   collectClassFieldMetadata(definition: FieldMetadata) {
     this.fields.push(definition);
   }
+
+  collectAdditionalFieldMetadata(definition: Metadata & { name: string | symbol }) {
+    this.additionalFieldMetadata.push(definition);
+  }
+
+  collectAdditionalObjectTypeMetadata(definition: Metadata) {
+    this.additionalObjectTypeMetadata.push(definition);
+  }
+
   collectHandlerParamMetadata(definition: ParamMetadata) {
     this.params.push(definition);
   }
@@ -145,7 +169,9 @@ export class MetadataStorage {
             middleware => middleware.target === field.target && middleware.fieldName === field.name,
           ),
         );
+        field.metadata = this.findAdditionalFieldMetadata(field.target, field.name);
       });
+      def.metadata = this.findAdditionalObjectTypeMetadata(def.target);
       def.fields = fields;
     });
   }
@@ -251,4 +277,25 @@ export class MetadataStorage {
     }
     return authorizedField.roles;
   }
+
+  private findAdditionalFieldMetadata(
+    target: Function,
+    fieldName: string,
+  ): Metadata & { name: string | symbol } | undefined {
+    const metadata = this.additionalFieldMetadata.find(
+      val => val.target === target && val.name === fieldName,
+    );
+    if (!metadata) {
+      return;
+    }
+    return metadata.data;
+  }
+
+  private findAdditionalObjectTypeMetadata(target: Function): Metadata | undefined {
+    const metadata = this.additionalObjectTypeMetadata.find(val => val.target === target);
+    if (!metadata) {
+      return;
+    }
+    return metadata.data;
+  }
 }

src/schema/schema-generator.ts

@@ -1,65 +1,70 @@
 import {
-  GraphQLSchema,
-  GraphQLObjectType,
-  GraphQLNamedType,
+  graphql,
+  GraphQLEnumType,
+  GraphQLEnumValueConfigMap,
+  GraphQLFieldConfigArgumentMap,
   GraphQLFieldConfigMap,
-  GraphQLOutputType,
+  GraphQLInputFieldConfigMap,
   GraphQLInputObjectType,
-  GraphQLFieldConfigArgumentMap,
   GraphQLInputType,
-  GraphQLInputFieldConfigMap,
   GraphQLInterfaceType,
-  graphql,
-  introspectionQuery,
-  GraphQLEnumType,
-  GraphQLEnumValueConfigMap,
+  GraphQLNamedType,
+  GraphQLObjectType,
+  GraphQLOutputType,
+  GraphQLSchema,
   GraphQLUnionType,
+  introspectionQuery,
 } from "graphql";
-import { withFilter, ResolverFn } from "graphql-subscriptions";
-
-import { getMetadataStorage } from "../metadata/getMetadataStorage";
+import { ResolverFn, withFilter } from "graphql-subscriptions";
+import { TypeOptions, TypeValue } from "../decorators/types";
+import {
+  GeneratingSchemaError,
+  MissingSubscriptionTopicsError,
+  UnionResolveTypeError,
+} from "../errors";
+import { convertTypeIfScalar, getEnumValuesMap, wrapWithTypeOptions } from "../helpers/types";
+import { ResolverFilterData, ResolverTopicData } from "../interfaces";
 import {
-  ResolverMetadata,
-  ParamMetadata,
   ClassMetadata,
+  ParamMetadata,
+  ResolverMetadata,
   SubscriptionResolverMetadata,
 } from "../metadata/definitions";
-import { TypeOptions, TypeValue } from "../decorators/types";
-import { wrapWithTypeOptions, convertTypeIfScalar, getEnumValuesMap } from "../helpers/types";
+
+import { getMetadataStorage } from "../metadata/getMetadataStorage";
 import {
-  createHandlerResolver,
   createAdvancedFieldResolver,
+  createHandlerResolver,
   createSimpleFieldResolver,
 } from "../resolvers/create";
 import { BuildContext, BuildContextOptions } from "./build-context";
-import {
-  UnionResolveTypeError,
-  GeneratingSchemaError,
-  MissingSubscriptionTopicsError,
-} from "../errors";
-import { ResolverFilterData, ResolverTopicData } from "../interfaces";
 import { getFieldMetadataFromInputType, getFieldMetadataFromObjectType } from "./utils";
 
 interface ObjectTypeInfo {
   target: Function;
   type: GraphQLObjectType;
 }
+
 interface InputObjectTypeInfo {
   target: Function;
   type: GraphQLInputObjectType;
 }
+
 interface InterfaceTypeInfo {
   target: Function;
   type: GraphQLInterfaceType;
 }
+
 interface EnumTypeInfo {
   enumObj: object;
   type: GraphQLEnumType;
 }
+
 interface UnionTypeInfo {
   unionSymbol: symbol;
   type: GraphQLUnionType;
 }
+
 // tslint:disable-next-line:no-empty-interface
 export interface SchemaGeneratorOptions extends BuildContextOptions {}
 
@@ -236,6 +241,7 @@ export abstract class SchemaGenerator {
                     : createSimpleFieldResolver(field),
                   description: field.description,
                   deprecationReason: field.deprecationReason,
+                  ...field.metadata,
                 };
                 return fieldsMap;
               },
@@ -264,6 +270,7 @@ export abstract class SchemaGenerator {
             }
             return fields;
           },
+          ...objectType.metadata,
         }),
       };
     });