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· 5 min read
Nathaniel Tucker

Collections enable Arrays and Objects to be easily extended by pushing or unshifting new members. The namesake comes from Backbone Collections.

Collections are now the default schema for Resource.getList.

import { Entity } from '@data-client/rest';
import { createResource } from '@data-client/rest';

export class Todo extends Entity {
  id = 0;
  userId = 0;
  title = '';
  completed = false;
  pk() {
    return `${this.id}`;
  }
  static key = 'Todo';
}
export const TodoResource = createResource({
  urlPrefix: 'https://jsonplaceholder.typicode.com',
  path: '/todos/:id',
  searchParams: {} as { userId?: string | number } | undefined,
  schema: Todo,
  optimistic: true,
});

import { useController } from '@data-client/react';
import { TodoResource, type Todo } from './TodoResource';

export default function TodoItem({ todo }: { todo: Todo }) {
  const ctrl = useController();
  const handleChange = e =>
    ctrl.fetch(
      TodoResource.partialUpdate,
      { id: todo.id },
      { completed: e.currentTarget.checked },
    );
  const handleDelete = () =>
    ctrl.fetch(TodoResource.delete, {
      id: todo.id,
    });
  return (
    <div className="listItem nogap">
      <label>
        <input
          type="checkbox"
          checked={todo.completed}
          onChange={handleChange}
        />
        {todo.completed ? <strike>{todo.title}</strike> : todo.title}
      </label>
      <CancelButton onClick={handleDelete} />
    </div>
  );
}

import { useController } from '@data-client/react';
import { TodoResource } from './TodoResource';

export default function CreateTodo({ userId }: { userId: number }) {
  const ctrl = useController();
  const handleKeyDown = async e => {
    if (e.key === 'Enter') {
      ctrl.fetch(TodoResource.getList.push, {
        userId,
        title: e.currentTarget.value,
        id: Math.random(),
      });
      e.currentTarget.value = '';
    }
  };
  return (
    <div className="listItem nogap">
      <label>
        <input type="checkbox" name="new" checked={false} disabled />
        <input type="text" onKeyDown={handleKeyDown} />
      </label>
    </div>
  );
}

import { useSuspense } from '@data-client/react';
import { TodoResource } from './TodoResource';
import TodoItem from './TodoItem';
import CreateTodo from './CreateTodo';

function TodoList() {
  const userId = 1;
  const todos = useSuspense(TodoResource.getList, { userId });
  return (
    <div>
      {todos.map(todo => (
        <TodoItem key={todo.pk()} todo={todo} />
      ))}
      <CreateTodo userId={userId} />
    </div>
  );
}
render(<TodoList />);
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Upgrading is quite simple, as @data-client/rest/next and @data-client/react/next were introduced to allow incremental adoption of the new APIs changed in this release. This makes the actual upgrade a simple import rename.

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