feat(repository): add belongsToUniquely sugar syntax method

examples/todo-list/src/controllers/index.ts

@@ -6,5 +6,4 @@
 export * from './todo.controller';
 export * from './todo-list.controller';
 export * from './todo-list-todo.controller';
-export * from './todo-list-author.controller';
-export * from './author.controller';
+export * from './todo-list-image.controller';

examples/todo-list/src/controllers/todo-list-image.controller.ts

@@ -0,0 +1,37 @@
+import {TodoListRepository} from '../repositories';
+import {repository} from '@loopback/repository';
+import {param, post, requestBody, get} from '@loopback/rest';
+import {TodoListImage} from '../models';
+
+export class TodoListImageController {
+  constructor(
+    @repository(TodoListRepository) protected todoListRepo: TodoListRepository,
+  ) {}
+
+  @post('/todo-lists/{id}/image', {
+    responses: {
+      '200': {
+        description: 'create todoListImage model instance',
+        content: {'application/json': {schema: {'x-ts-type': TodoListImage}}},
+      },
+    },
+  })
+  async create(
+    @param.path.number('id') id: number,
+    @requestBody() image: TodoListImage,
+  ): Promise<TodoListImage> {
+    return await this.todoListRepo.image(id).create(image);
+  }
+
+  @get('/todo-lists/{id}/image', {
+    responses: {
+      '200': {
+        description: 'The image belonging to the TodoList',
+        content: {'application/json': {schema: {'x-ts-type': TodoListImage}}},
+      },
+    },
+  })
+  async find(@param.path.number('id') id: number): Promise<TodoListImage> {
+    return await this.todoListRepo.image(id).get();
+  }
+}

examples/todo-list/src/models/index.ts

@@ -5,4 +5,4 @@
 
 export * from './todo.model';
 export * from './todo-list.model';
-export * from './author.model';
+export * from './todo-list-image.model';

examples/todo-list/src/models/todo-list-image.model.ts

@@ -0,0 +1,20 @@
+import {Entity, model, property, belongsToUniquely} from '@loopback/repository';
+import {TodoList} from './todo-list.model';
+
+@model()
+export class TodoListImage extends Entity {
+  @belongsToUniquely(() => TodoList)
+  todoListId?: number;
+
+  @property({
+    required: true,
+  })
+  // Ideally we would use Buffer type here, but
+  // that is not supported yet.
+  // see https://github.com/strongloop/loopback-next/issues/1742
+  value: string;
+
+  constructor(data?: Partial<TodoListImage>) {
+    super(data);
+  }
+}

examples/todo-list/src/models/todo-list.model.ts

@@ -5,7 +5,7 @@
 
 import {Entity, model, property, hasMany, hasOne} from '@loopback/repository';
 import {Todo} from './todo.model';
-import {Author} from './author.model';
+import {TodoListImage} from './todo-list-image.model';
 
 @model()
 export class TodoList extends Entity {
@@ -29,8 +29,8 @@ export class TodoList extends Entity {
   @hasMany(() => Todo)
   todos: Todo[];
 
-  @hasOne(() => Author)
-  author: Author;
+  @hasOne(() => TodoListImage)
+  image: TodoListImage;
 
   constructor(data?: Partial<TodoList>) {
     super(data);

examples/todo-list/src/repositories/index.ts

@@ -5,4 +5,3 @@
 
 export * from './todo.repository';
 export * from './todo-list.repository';
-export * from './author.repository';

examples/todo-list/src/repositories/author.repository.ts → examples/todo-list/src/repositories/todo-list-image.repository.ts

@@ -1,28 +1,27 @@
 import {
   DefaultCrudRepository,
-  juggler,
   repository,
   BelongsToAccessor,
 } from '@loopback/repository';
-import {Author, TodoList} from '../models';
+import {TodoListImage, TodoList} from '../models';
 import {DbDataSource} from '../datasources';
 import {inject, Getter} from '@loopback/core';
 import {TodoListRepository} from './todo-list.repository';
 
-export class AuthorRepository extends DefaultCrudRepository<
-  Author,
-  typeof Author.prototype.todoListId
+export class TodoListImageRepository extends DefaultCrudRepository<
+  TodoListImage,
+  typeof TodoListImage.prototype.todoListId
 > {
   public readonly todoList: BelongsToAccessor<
     TodoList,
-    typeof Author.prototype.todoListId
+    typeof TodoListImage.prototype.todoListId
   >;
   constructor(
     @inject('datasources.db') dataSource: DbDataSource,
     @repository.getter('TodoListRepository')
     protected todoListRepositoryGetter: Getter<TodoListRepository>,
   ) {
-    super(Author, dataSource);
+    super(TodoListImage, dataSource);
     this.todoList = this._createBelongsToAccessorFor(
       'todoList',
       todoListRepositoryGetter,

examples/todo-list/src/repositories/todo-list.repository.ts

@@ -11,9 +11,9 @@ import {
   repository,
   HasOneRepositoryFactory,
 } from '@loopback/repository';
-import {Todo, TodoList, Author} from '../models';
+import {Todo, TodoList, TodoListImage} from '../models';
 import {TodoRepository} from './todo.repository';
-import {AuthorRepository} from './author.repository';
+import {TodoListImageRepository} from './todo-list-image.repository';
 
 export class TodoListRepository extends DefaultCrudRepository<
   TodoList,
@@ -23,25 +23,25 @@ export class TodoListRepository extends DefaultCrudRepository<
     Todo,
     typeof TodoList.prototype.id
   >;
-  public readonly author: HasOneRepositoryFactory<
-    Author,
+  public readonly image: HasOneRepositoryFactory<
+    TodoListImage,
     typeof TodoList.prototype.id
   >;
 
   constructor(
     @inject('datasources.db') dataSource: juggler.DataSource,
     @repository.getter('TodoRepository')
     protected todoRepositoryGetter: Getter<TodoRepository>,
-    @repository.getter('AuthorRepository')
-    protected todoListImageRepositoryGetter: Getter<AuthorRepository>,
+    @repository.getter('TodoListImageRepository')
+    protected todoListImageRepositoryGetter: Getter<TodoListImageRepository>,
   ) {
     super(TodoList, dataSource);
     this.todos = this._createHasManyRepositoryFactoryFor(
       'todos',
       todoRepositoryGetter,
     );
-    this.author = this._createHasOneRepositoryFactoryFor(
-      'author',
+    this.image = this._createHasOneRepositoryFactoryFor(
+      'image',
       todoListImageRepositoryGetter,
     );
   }