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id	title	challengeType	forumTopicId
587d7fb8367417b2b2512c0e	Perform Classic Updates by Running Find, Edit, then Save	2	301541

Description

In the good old days, this was what you needed to do if you wanted to edit a document, and be able to use it somehow (e.g. sending it back in a server response). Mongoose has a dedicated updating method: Model.update(). It is bound to the low-level mongo driver. It can bulk-edit many documents matching certain criteria, but it doesn’t send back the updated document, only a 'status' message. Furthermore, it makes model validations difficult, because it just directly calls the mongo driver.

Instructions

Modify the findEditThenSave function to find a person by _id (use any of the above methods) with the parameter personId as search key. Add "hamburger" to the list of the person's favoriteFoods (you can use Array.push()). Then - inside the find callback - save() the updated Person.

Note: This may be tricky, if in your Schema, you declared favoriteFoods as an Array, without specifying the type (i.e. [String]). In that case, favoriteFoods defaults to Mixed type, and you have to manually mark it as edited using document.markModified('edited-field'). See Mongoose documentation

Tests

tests:
  - text: Find-edit-update an item should succeed
    testString: |
      getUserInput => $.post(getUserInput('url') + '/_api/find-edit-save', {name:'Poldo', age: 40, favoriteFoods:['spaghetti']}).then(data => {
        assert.equal(data.name, 'Poldo', 'item.name is not what is expected');
        assert.equal(data.age, 40, 'item.age is not what expected');
        assert.deepEqual(data.favoriteFoods, ['spaghetti', 'hamburger'], 'item.favoriteFoods is not what expected');
        assert.equal(data.__v, 1, 'The item should be previously edited');
        }, xhr => { throw new Error(xhr.responseText); })

Challenge Seed

Solution

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