freeCodeCamp/curriculum/challenges/chinese/05-apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model.remove.chinese.md

id, title, challengeType, forumTopicId, localeTitle

id	title	challengeType	forumTopicId	localeTitle
587d7fb8367417b2b2512c11	Delete Many Documents with model.remove()	2	301538	使用 model.remove() 删除多个 document

Description

Model.remove() 可以用于删除符合给定匹配条件的所有 document。

Instructions

如果想要删除所有叫 "Mary" 的人，我们可以使用 Model.remove()，并给它传入一个包含 name 字段的对象作为查询条件。当然，我们还需要给它传入一个回调函数。 注意：Model.remove() 不会返回被删除的 document，而是会返回一个包含操作结果以及受影响的数据数量的 JSON 对象。不要忘记将它传入 done() 回调，因为我们需要在挑战的测试中调用它。

Tests

tests:
  - text: Deleting many items at once should succeed
  - text: 应成功地删除多条数据
    testString: 'getUserInput => $.ajax({url: getUserInput(''url'') + ''/_api/remove-many-people'', type: ''POST'', contentType:''application/json'', data: JSON.stringify([{name: ''Mary'', age: 16, favoriteFoods: [''lollipop'']}, {name: ''Mary'', age: 21, favoriteFoods: [''steak'']}])}).then(data => { assert.isTrue(!!data.ok, ''The mongo stats are not what expected''); assert.equal(data.n, 2, ''The number of items affected is not what expected''); assert.equal(data.count, 0, ''the db items count is not what expected''); }, xhr => { throw new Error(xhr.responseText); })'

Challenge Seed

Solution

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