Catch 404 error when using store.findQuery

问题

I'm using Embers findQuery method and wonder how to catch 404 errors when there are no results?

this.store.findQuery('customer', { hasProjects: true, getArchivedProjects: archived }).then(function(customers) {
});

If the query is empty, the code inside this then function doesn't get fired, so I can't even check the type of customers.

Example:

this.store.findQuery('customer', { hasProjects: true, getArchivedProjects: archived }).then(function(customers) {
  console.log('foo')
});

If the query returns a 404, console.log doesn't be fired.

回答1:

The findQuery function returns a promise. You may then provide two functions to the then(), the first being the success path, the second being the failure path... for example:

this.store.findQuery('customer', { hasProjects: true, getArchivedProjects: archived }).then(function(customers) {
    console.log('foo')
}, function(error) { /* do something with error */ });

回答2:

Alternative answer:

Add a error hook to the corresponding route:

App.CustomersIndexRoute = Ember.Route.extend({
  actions: {
    error: function(reason) {
      if (reason.status === 404) {
        // do something ...
      }
    }
  }
})

See: http://emberjs.com/guides/routing/asynchronous-routing/#toc_when-promises-reject.

来源：https://stackoverflow.com/questions/20905772/catch-404-error-when-using-store-findquery