define('ember-data/attr', ['exports'], function (exports) {
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = attr;
/**
@module ember-data
*/
function getDefaultValue(record, options, key) {
if (typeof options.defaultValue === 'function') {
return options.defaultValue.apply(null, arguments);
} else {
var defaultValue = options.defaultValue;
(true && !(typeof defaultValue !== 'object' || defaultValue === null) && Ember.deprecate('Non primitive defaultValues are deprecated because they are shared between all instances. If you would like to use a complex object as a default value please provide a function that returns the complex object.', typeof defaultValue !== 'object' || defaultValue === null, {
id: 'ds.defaultValue.complex-object',
until: '3.0.0'
}));
return defaultValue;
}
}
function hasValue(record, key) {
return key in record._attributes || key in record._inFlightAttributes || key in record._data;
}
function getValue(record, key) {
if (key in record._attributes) {
return record._attributes[key];
} else if (key in record._inFlightAttributes) {
return record._inFlightAttributes[key];
} else {
return record._data[key];
}
}
/**
`DS.attr` defines an attribute on a [DS.Model](/api/data/classes/DS.Model.html).
By default, attributes are passed through as-is, however you can specify an
optional type to have the value automatically transformed.
Ember Data ships with four basic transform types: `string`, `number`,
`boolean` and `date`. You can define your own transforms by subclassing
[DS.Transform](/api/data/classes/DS.Transform.html).
Note that you cannot use `attr` to define an attribute of `id`.
`DS.attr` takes an optional hash as a second parameter, currently
supported options are:
- `defaultValue`: Pass a string or a function to be called to set the attribute
to a default value if none is supplied.
Example
```app/models/user.js
import DS from 'ember-data';
export default DS.Model.extend({
username: DS.attr('string'),
email: DS.attr('string'),
verified: DS.attr('boolean', { defaultValue: false })
});
```
Default value can also be a function. This is useful it you want to return
a new object for each attribute.
```app/models/user.js
import DS from 'ember-data';
export default DS.Model.extend({
username: DS.attr('string'),
email: DS.attr('string'),
settings: DS.attr({
defaultValue() {
return {};
}
})
});
```
The `options` hash is passed as second argument to a transforms'
`serialize` and `deserialize` method. This allows to configure a
transformation and adapt the corresponding value, based on the config:
```app/models/post.js
import DS from 'ember-data';
export default DS.Model.extend({
text: DS.attr('text', {
uppercase: true
})
});
```
```app/transforms/text.js
import DS from 'ember-data';
export default DS.Transform.extend({
serialize(value, options) {
if (options.uppercase) {
return value.toUpperCase();
}
return value;
},
deserialize(value) {
return value;
}
})
```
@namespace
@method attr
@for DS
@param {String|Object} type the attribute type
@param {Object} options a hash of options
@return {Attribute}
*/
function attr(type, options) {
if (typeof type === 'object') {
options = type;
type = undefined;
} else {
options = options || {};
}
var meta = {
type: type,
isAttribute: true,
options: options
};
return Ember.computed({
get: function get(key) {
var internalModel = this._internalModel;
if (hasValue(internalModel, key)) {
return getValue(internalModel, key);
} else {
return getDefaultValue(this, options, key);
}
},
set: function set(key, value) {
var internalModel = this._internalModel;
var oldValue = getValue(internalModel, key);
var originalValue = void 0;
if (value !== oldValue) {
// Add the new value to the changed attributes hash; it will get deleted by
// the 'didSetProperty' handler if it is no different from the original value
internalModel._attributes[key] = value;
if (key in internalModel._inFlightAttributes) {
originalValue = internalModel._inFlightAttributes[key];
} else {
originalValue = internalModel._data[key];
}
this._internalModel.send('didSetProperty', {
name: key,
oldValue: oldValue,
originalValue: originalValue,
value: value
});
}
return value;
}
}).meta(meta);
}
});