ContextQMD
Back to Freecodecamp

Use model.findOne() to Return a Single Matching Document from Your Database

curriculum/challenges/english/blocks/mongodb-and-mongoose/587d7fb7367417b2b2512c0c.md

latest1.1 KB
Original Source

--description--

Model.findOne() behaves like Model.find(), but it returns only one document (not an array), even if there are multiple items. It is especially useful when searching by properties that you have declared as unique.

--instructions--

Modify the findOneByFood function to find just one person which has a certain food in the person's favorites, using Model.findOne() -> Person. Use the function argument food as search key.

--hints--

Find one item should succeed

js
  const response = await fetch(code + '/_api/find-one-by-food', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      name: 'Gary',
      age: 46,
      favoriteFoods: ['chicken salad']
    })
  });
  if (!response.ok) {
    throw new Error(await response.text());
  }
  const data = await response.json();
  assert.equal(data.name, 'Gary', 'item.name is not what expected');
  assert.deepEqual(
    data.favoriteFoods,
    ['chicken salad'],
    'item.favoriteFoods is not what expected'
  );
  assert.equal(data.__v, 0, 'The item should be not previously edited');