CODEWITHSUNDEEP
javascriptbackbone.js
bobo2000
bobo2000

Reputation: 1877

SELECT * FROM WHERE backbone.js

I need to do a simple check to see if a model already exists.

In SQL I would return the result set and cross reference it with a temp variable. How can I do the equivalent in backbone.js?

Upvotes: 0

Views: 119

Answers (1)

raina77ow
raina77ow

Reputation: 106385

There's a direct equivalent - Collection#where method:

Return an array of all the models in a collection that match the passed attributes.

var friends = new Backbone.Collection([
  {name: "Athos",      job: "Musketeer"},
  {name: "Porthos",    job: "Musketeer"},
  {name: "Aramis",     job: "Musketeer"},
  {name: "d'Artagnan", job: "Guard"},
]);

var musketeers = friends.where({job: "Musketeer"});

alert(musketeers.length); // 3

For more complex queries use Collection#filter:

var musketeersWhoseNameStartsWithA = friends.filter(function(item) {
  return item.get('name').indexOf('A') === 0;
});

Upvotes: 1

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