@eflexsystems/ember-data-copyable
v1.1.2-2
Published
Intelligently copy an Ember Data model and all of its relationships
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Ember Data Copyable
Intelligently copy an Ember Data model and all of its relationships
Features
- Shallow & deep copy an Ember Data model
- Shallow & deep copy model relationships
- Handles cyclical relationships
- Handles custom transforms to create true copies
- Overwrite, ignore attributes, and copy objects by reference
- Intelligent failure and cleanup
- Uses ember-concurrency to allow cancelling a copy task
Installation
ember install ember-data-copyable
Helpful Links
Looking for help?
If it is a bug please open an issue on GitHub.
Setup
This addon provides a Copyable
mixin which allows you to copy a model. To get started,
just import the mixin and add it to your model.
// models/user.js
import DS from 'ember-data';
import Copyable from 'ember-data-copyable';
export default DS.Model.extend(Copyable, {
guid: DS.attr('number'),
firstName: DS.attr('string'),
lastName: DS.attr('string'),
address: DS.belongsTo('address'),
friends: DS.hasMany('user'),
// Specific copy options for the model
copyableOptions: {}
});
In your model you can specify default options via the copyableOptions
object.
Please see options for more details.
Copying Relationships
To copy a model's relationship, that relational model must have the Copyable
mixin or else it will just
be copied by reference.
Usage
Once the model is setup, we can use the copy
method on an instance to duplicate it.
Copy Method Signature
function copy(deep = false, options = {}) {}
deep
: BooleanIf false a shallow copy of the model's attributes will be created. All relationships will be copied over by reference.
If true, a deep copy of the model and it's relationships will be created. If a relational model has the Copyable mixin, it will also be deep copied.
options
: ObjectCopy options. See options for more details.
NOTE: Options passed into the copy method take precedence over those specified on the model.
Returns a cancelable promise like ember-concurrency TaskInstance.
Examples
Normal Usage
const model = this.get('store').peekRecord('user', 1);
model
.copy(true, {
ignoreAttributes: ['guid'],
copyByReference: ['address'],
overwrite: {
id: 2,
firstName: 'Offir'
}
})
.then(
copy => {
// Handle success
return copy.save();
},
e => {
// Handle error or cancellation
}
);
Task Cancellation
Since the copy
method returns an ember-concurrency TaskInstance,
we have the ability to cancel a running copy task at any time.
const model = this.get('store').peekRecord('user', 1);
const copyTaskInstance = model.copy(true);
// Cancel our copy task
copyTaskInstance.cancel();
Options
These options can either be specified via the copyableOptions
object on the DS.Model class or
passed into the copy
method.
ignoreAttributes
Attributes to ignore when copying.
ignoreAttributes: ['guid', 'address'];
otherAttributes
Other attributes to copy over that are not defined via DS.attr, DS.belongsTo, or DS.hasMany.
otherAttributes: ['timestamp', 'someFlag'];
copyByReference
Attributes to copy only by reference. If the attribute has the Copyable
mixin, it will
be ignored and not be copied, just copied by reference.
copyByReference: ['friends'];
overwrite
Overwrite attributes with the specified values. This will also add properties that are not found on the model.
overwrite: {
id: 2,
firstName: 'Offir - Copy',
address: this.get('store').createRecord('address', { /* ... */ }),
unknownProperty: 'Foo Bar'
}
relationships
Specify options to nested models.
Nested relationships options can also include a deep
option. If set to false,
the relationship will be shallow copied.
relationships: {
address: {
ignoreAttributes: ['streetName'],
overwrite: {
state: 'CA'
}
},
friends: {
copyByReference: ['address']
},
profile: {
deep: false
}
}