@darrion.kuhn
In Ember.js, you can create a form to save 1:n relations by using Ember Data and the Ember Data Store. Here is a step-by-step guide on how to create a form to save 1:n relations in Ember.js:
- Define your models: First, define your models with the 1:n relationship in your Ember app. For example, let's say you have models for a parent entity and a child entity. The parent entity can have multiple child entities, so the relationship between them is 1:n.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
// models/parent.js
import DS from 'ember-data';
export default DS.Model.extend({
name: DS.attr('string'),
children: DS.hasMany('child')
});
// models/child.js
import DS from 'ember-data';
export default DS.Model.extend({
name: DS.attr('string'),
parent: DS.belongsTo('parent')
});
|
- Create a form template: Next, create a template for your form where users can input data for the parent entity and its child entities. You can use Ember's component-based architecture to create separate components for the parent and child input fields.
1
2
3
4
5
6
7
8
9
10
11
12
13
|
<!-- templates/parent-form.hbs -->
<form {{action "save" on="submit"}}>
{{input value=model.name placeholder="Parent Name"}}
{{#each model.children as |child|}}
{{child-input child=child}}
{{/each}}
<button type="submit">Save</button>
</form>
<!-- templates/components/child-input.hbs -->
{{input value=child.name placeholder="Child Name"}}
|
- Define actions in the controller: In the controller for your form, define actions to handle saving the form data. You can use the Ember Data Store to create new records for the parent and child entities and establish the relationship between them.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
// controllers/parent-form.js
import Controller from '@ember/controller';
export default Controller.extend({
actions: {
save() {
const parent = this.get('model');
parent.save().then(() => {
this.get('model.children').forEach(child => {
child.set('parent', parent);
child.save();
});
});
}
}
});
|
- Set up routes and data loading: Finally, set up routes to load the parent entity and its child entities. You can use Ember's Route model hook to fetch the data from your API and pass it to the form template.
1
2
3
4
5
6
7
8
9
10
|
// routes/parent-form.js
import Route from '@ember/routing/route';
export default Route.extend({
model() {
return this.store.createRecord('parent', {
children: [this.store.createRecord('child')]
});
}
});
|
By following these steps, you can create a form to save 1:n relations in Ember.js using Ember Data and the Ember Data Store. This will allow users to input data for both the parent entity and its child entities and save the data together as a single transaction.