[英]Backbone model saving while initialized with dynamic url
我有一個骨干模型,如下所示
define([], function(){
var instaceUrl;
var PatientModel = Backbone.Model.extend({
url: function() {
return instanceUrl;
},
initialize: function(options) {
instanceUrl = options.instanceUrl;
},
defaults: {
"person": "",
"identifiers":""
}
});
console.log('Patient model');
return PatientModel;
});
當我嘗試保存患者模型patientModel.save
,在請求有效負載中添加了一個額外的instanceUrl
屬性
var patientModel = new PatientModel({instanceUrl: '/patient'});
...
...
patientModel.set("identifiers", identifiers);
patientModel.set("person", uuid);
patientDetails = patientModel.toJSON();
patientModel.save(patientDetails, {
beforeSend : sendAuthentication,
success : function(model, response, options) {
uuid = response.uuid;
},
error : function() {
alert('failed');
}
});
模型發送以下有效載荷
{
"instanceUrl": "/patient", // why is it added ?
"person": "c014068c-824d-4346-84f0-895eb3ec6af7",
"identifiers": [
{
"preferred": true,
"location": "f15bc055-765a-4996-a207-ec4945972f33",
"identifier": "saks9639",
"identifierType": "866aedab-8a37-4b15-95d3-2b775fc0caac"
}
]
}
REST API調用成功所需的有效負載為
{
"person": "c014068c-824d-4346-84f0-895eb3ec6af7",
"identifiers": [
{
"preferred": true,
"location": "f15bc055-765a-4996-a207-ec4945972f33",
"identifier": "saks9639",
"identifierType": "866aedab-8a37-4b15-95d3-2b775fc0caac"
}
]
}
如何避免將instanceUrl
作為模型屬性考慮到patientModel
?
模型構造函數/初始化方法的方法簽名為
構造函數/初始化新模型([屬性],[選項])
傳遞的第一個對象將添加為屬性。 您在第一個哈希中傳遞instanceUrl
,它被視為一個屬性。 有關演示,請參見此提琴: http : //jsfiddle.net/nikoshr/GADW7/
使用第二個對象聲明您的選項1 :
var PatientModel = Backbone.Model.extend({
url: function() {
return this.instanceUrl;
},
initialize: function(attrs, options) {
this.instanceUrl = options.instanceUrl;
},
defaults: {
"person": "",
"identifiers":""
}
});
然后將其實例化為
var patientModel = new PatientModel({}, {instanceUrl: '/patient'});
和演示http://jsfiddle.net/nikoshr/GADW7/1/
1 :請注意,我將instanceUrl
設置為instanceUrl
的成員,使用全局變量(甚至僅限於您的模塊)也必然會導致困擾
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