Ember.js 如何使用余烬数据支持多个API主机?
我有一个在用户机器上运行的余烬应用程序(带有余烬数据)。有一个API服务器在他们的机器上运行,还有一个在线运行。我需要允许用户选择模型的持久化位置(在他们的机器上运行的API或在线API)。因此,有两个API主机:Ember.js 如何使用余烬数据支持多个API主机?,ember.js,ember-data,Ember.js,Ember Data,我有一个在用户机器上运行的余烬应用程序(带有余烬数据)。有一个API服务器在他们的机器上运行,还有一个在线运行。我需要允许用户选择模型的持久化位置(在他们的机器上运行的API或在线API)。因此,有两个API主机: http://localhost:3000 and http://api.example.com 当用户创建记录时,他们可以设置是希望记录保存在本地(通过本地API服务器),还是在线保存。我将此选择持久化为记录上名为dataSource的值 因此,根据记录数据源,我需要将模型的em
http://localhost:3000
and
http://api.example.com
当用户创建记录时,他们可以设置是希望记录保存在本地(通过本地API服务器),还是在线保存。我将此选择持久化为记录上名为dataSource的值
因此,根据记录数据源,我需要将模型的ember RestaAdapter主机设置为正确的值。我知道每个型号都可以覆盖适配器。例如,我可以创建一个RecordAdapter并手动将主机设置为一个值。但是,主机依赖于记录中的一个值,我不确定如何使用余烬数据实现这一点,因为rest适配器“主机”是一个属性,而不是一个函数
用户流示例:
- 用户创建新记录,选择本地存储此记录的选项
- 记录被持久化到本地主机
- 用户创建新记录,选择联机存储此记录的选项
- 记录被持久化到
- 无论何时保存、更新、删除记录等,都必须检查记录数据源以确定操作中要使用的api主机
buildURL
:
根据Ember数据源,RestaAdapter的默认实现为:
/**
Builds a URL for a given type and optional ID.
By default, it pluralizes the type's name (for example, 'post'
becomes 'posts' and 'person' becomes 'people'). To override the
pluralization see [pathForType](#method_pathForType).
If an ID is specified, it adds the ID to the path generated
for the type, separated by a `/`.
@method buildURL
@param {String} type
@param {String} id
@param {DS.Model} record
@return {String} url
*/
buildURL: function(type, id, record) {
var url = [],
host = get(this, 'host'),
prefix = this.urlPrefix();
if (type) { url.push(this.pathForType(type)); }
//We might get passed in an array of ids from findMany
//in which case we don't want to modify the url, as the
//ids will be passed in through a query param
if (id && !Ember.isArray(id)) { url.push(encodeURIComponent(id)); }
if (prefix) { url.unshift(prefix); }
url = url.join('/');
if (!host && url) { url = '/' + url; }
return url;
},
如您所见,适配器上的buildURL
提供了记录,因此可以根据该记录配置URL
以下示例显示了如何根据模型实例上的isLocal
属性选择前缀:
// app/adapters/application.js
import Ember from 'ember';
import DS from 'ember-data';
var get = Ember.get;
export default DS.RESTAdapter.extend({
buildURL: function(type, id, record) {
var url = [],
host = get(this, 'host'),
prefix;
// choose prefix based on model setting
if (record && get(record, 'isLocal')) {
prefix = 'http://localhost:3000';
} else {
prefix = this.urlPrefix();
}
if (type) { url.push(this.pathForType(type)); }
//We might get passed in an array of ids from findMany
//in which case we don't want to modify the url, as the
//ids will be passed in through a query param
if (id && !Ember.isArray(id)) { url.push(encodeURIComponent(id)); }
if (prefix) { url.unshift(prefix); }
url = url.join('/');
if (!host && url) { url = '/' + url; }
return url;
},
});
您需要覆盖适配器上的
buildURL
:
根据Ember数据源,RestaAdapter的默认实现为:
/**
Builds a URL for a given type and optional ID.
By default, it pluralizes the type's name (for example, 'post'
becomes 'posts' and 'person' becomes 'people'). To override the
pluralization see [pathForType](#method_pathForType).
If an ID is specified, it adds the ID to the path generated
for the type, separated by a `/`.
@method buildURL
@param {String} type
@param {String} id
@param {DS.Model} record
@return {String} url
*/
buildURL: function(type, id, record) {
var url = [],
host = get(this, 'host'),
prefix = this.urlPrefix();
if (type) { url.push(this.pathForType(type)); }
//We might get passed in an array of ids from findMany
//in which case we don't want to modify the url, as the
//ids will be passed in through a query param
if (id && !Ember.isArray(id)) { url.push(encodeURIComponent(id)); }
if (prefix) { url.unshift(prefix); }
url = url.join('/');
if (!host && url) { url = '/' + url; }
return url;
},
如您所见,适配器上的buildURL
提供了记录,因此可以根据该记录配置URL
以下示例显示了如何根据模型实例上的isLocal
属性选择前缀:
// app/adapters/application.js
import Ember from 'ember';
import DS from 'ember-data';
var get = Ember.get;
export default DS.RESTAdapter.extend({
buildURL: function(type, id, record) {
var url = [],
host = get(this, 'host'),
prefix;
// choose prefix based on model setting
if (record && get(record, 'isLocal')) {
prefix = 'http://localhost:3000';
} else {
prefix = this.urlPrefix();
}
if (type) { url.push(this.pathForType(type)); }
//We might get passed in an array of ids from findMany
//in which case we don't want to modify the url, as the
//ids will be passed in through a query param
if (id && !Ember.isArray(id)) { url.push(encodeURIComponent(id)); }
if (prefix) { url.unshift(prefix); }
url = url.join('/');
if (!host && url) { url = '/' + url; }
return url;
},
});