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How to Handle More Than One Model Into A Template/Route In Ember.js?

5 minutes read

In Ember.js, you can handle multiple models in a single template or route by using the model hook in the route file. This hook allows you to fetch multiple models from your backend using store.findAll or store.findRecord methods.


Once you have fetched the necessary models, you can assign them to different properties in the controller or component associated with the template. For example, you can do something like this.controller.set('model1', model1) and this.controller.set('model2', model2) in the setupController hook in the route file.


In the template, you can then access the different models using the properties you have assigned them to in the controller. For example, you can loop through each model using {{#each model1 as |item|}} and {{#each model2 as |item|}}.


By following this approach, you can handle multiple models in a single template or route in Ember.js easily and efficiently.


How to pass multiple models to a template in Ember.js?

In Ember.js, you can pass multiple models to a template using the "model" hook in your route file.


Here's an example of how to pass multiple models to a template in Ember.js:

  1. Define your route file (e.g. app/routes/my-route.js):
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import Route from '@ember/routing/route';

export default Route.extend({
  model() {
    return Ember.RSVP.hash({
      model1: this.store.findAll('model1'),
      model2: this.store.findAll('model2')
    });
  }
});


  1. Use the setupController hook in the same route file to set the models on the controller:
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import Route from '@ember/routing/route';

export default Route.extend({
  model() {
    return Ember.RSVP.hash({
      model1: this.store.findAll('model1'),
      model2: this.store.findAll('model2')
    });
  },

  setupController(controller, models) {
    controller.setProperties(models);
  }
});


  1. Now in your template file (e.g. app/templates/my-route.hbs), you can access the models using their names as defined in the model hook:
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{{#each model1 as |item|}}
  <p>{{item.name}}</p>
{{/each}}

{{#each model2 as |item|}}
  <p>{{item.title}}</p>
{{/each}}


By following these steps, you can pass multiple models to a template in Ember.js and use them in your template as needed.


What is the recommended approach for passing multiple models from a route to a template in Ember.js?

The recommended approach for passing multiple models from a route to a template in Ember.js is to use the model hook in the route to fetch and return the required models. You can then access these models in the template by using the @model syntax.


Here is an example of how you can pass multiple models from a route to a template in Ember.js:

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// routes/example-route.js

import Route from '@ember/routing/route';

export default class ExampleRoute extends Route {
  model() {
    return {
      model1: this.store.findAll('model1'),
      model2: this.store.findAll('model2')
    };
  }
}



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<!-- templates/example-route.hbs -->

{{#each @model.model1 as |model1|}}
  <!-- Render model1 data here -->
{{/each}}

{{#each @model.model2 as |model2|}}
  <!-- Render model2 data here -->
{{/each}}


In this example, the model hook in the route returns an object with two properties model1 and model2, which are the models fetched using Ember Data's findAll method. In the template, we can access these models using the @model syntax and render the data accordingly.


Using this approach allows for better separation of concerns and makes it easier to manage multiple models in a route and template in Ember.js.


What is the Ember.js router behavior for handling multiple models in a single route?

In Ember.js, the router behavior for handling multiple models in a single route involves defining a route handler that fetches and returns all the required models from the server or another data source. This can be achieved by using the model() hook in the route handler to fetch multiple models and returning them as an object or array.


For example, you can define a route handler like this:

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import Route from '@ember/routing/route';

export default Route.extend({
  model() {
    return Ember.RSVP.hash({
      model1: this.store.findRecord('model1', 1),
      model2: this.store.findAll('model2'),
      // Add more model fetch calls here as needed
    });
  }
});


In this example, the model() hook fetches multiple models (model1 and model2 in this case) and returns them in an object using Ember.RSVP.hash. This ensures that all model fetch requests are resolved before transitioning to the route and rendering the template.


Once you have defined the route handler to fetch multiple models, you can access these models in the corresponding controller or template by referring to their keys in the resolved promise object. For example, in a controller file or template file:

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// controller file
import Controller from '@ember/controller';

export default Controller.extend({
  model1: Ember.computed.alias('model.model1'),
  model2: Ember.computed.alias('model.model2'),
});

// template file
{{model1.name}}
{{#each model2 as |item|}}
  {{item.name}}
{{/each}}


By following this pattern, you can handle multiple models in a single route in Ember.js and ensure that all the required data is fetched and available for rendering in the template.


How to handle asynchronous data loading for multiple models in Ember.js?

In Ember.js, you can handle asynchronous data loading for multiple models by using the ember-concurrency addon.


Here is an example of how you can handle asynchronous data loading for multiple models in Ember.js using ember-concurrency:

  1. Install the ember-concurrency addon by running the following command:
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ember install ember-concurrency


  1. Define a task that loads the data for each model asynchronously in your route file. For example:
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import Route from '@ember/routing/route';
import { inject as service } from '@ember/service';
import { task } from 'ember-concurrency';

export default class MyRoute extends Route {
  @service store;

  model() {
    return {
      usersTask: this.loadUsersData.perform(),
      postsTask: this.loadPostsData.perform()
    };
  }

  @task
  *loadUsersData() {
    return yield this.store.findAll('user');
  }

  @task
  *loadPostsData() {
    return yield this.store.findAll('post');
  }
}


  1. In your template file, you can access the loaded data using the taskInstance property provided by ember-concurrency. For example:
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<ul>
  <li>User Names:</li>
  {{#each this.model.usersTask.last.value as |user|}}
    <li>{{user.name}}</li>
  {{/each}}
</ul>

<ul>
  <li>Post Titles:</li>
  {{#each this.model.postsTask.last.value as |post|}}
    <li>{{post.title}}</li>
  {{/each}}
</ul>


By using ember-concurrency, you can easily handle asynchronous data loading for multiple models in Ember.js in a clean and efficient way.

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