我正在使用 aurelia-validate,如果我使用变量,我的验证工作正常,但我需要它来验证对象而不是变量的属性:
这是有效的:
import {Validation} from 'aurelia-validation';
import {ensure} from 'aurelia-validation';
import {ItemService} from './service';
export class EditItem {
static inject() {
return [Validation, ItemService];
}
@ensure(function(it){
it.isNotEmpty()
.hasLengthBetween(3,10);
})
name = '';
@ensure(function(it){
it.isNotEmpty()
.hasMinLength(10)
.matches(/^https?:\/\/.{3,}$/) //looks like a url
.matches(/^\S*$/); //no spaces
})
url = '';
constructor(validation, service) {
this.validation = validation.on(this);
this.service = service;
}
activate(params){
return this.service.getItem(params.id).then(res => {
console.log(res);
this.name = res.content.name; //populate
this.url = res.content.url;
});
}
update() {
this.validation.validate().then(
() => {
var data = {
name: this.name,
url: this.url
};
this.service.updateItem(data).then(res => {
this.message = "Thank you!";
})
}
);
}
}
这就是我想要做的(但不起作用)...而且我不确定将属性保留在类上还是拥有一个名为 this.item
的属性是否更好其中包含属性(这是典型的角度方式):
import {Validation} from 'aurelia-validation';
import {ensure} from 'aurelia-validation';
import {ItemService} from './service';
export class EditItem {
static inject() {
return [Validation, ItemService];
}
@ensure(function(it){
it.isNotEmpty()
.hasLengthBetween(3,10);
})
this.item.name; //no assignment here should happen
@ensure(function(it){
it.isNotEmpty()
.hasMinLength(10)
.matches(/^https?:\/\/.{3,}$/) //looks like a url
.matches(/^\S*$/); //no spaces
})
this.item.url; //no assignment?
constructor(validation, service) {
this.validation = validation.on(this);
this.service = service;
this.item = null;
}
activate(params){
return this.service.getItem(params.id).then(res => {
console.log(res);
this.item = res.content; //populate with object from api call
});
}
update() {
this.validation.validate().then(
() => {
var data = {
name: this.item.name,
url: this.item.url
};
this.service.updateItem(data).then(res => {
this.message = "Thank you!";
})
}
);
}
}
有人可以在这里给我一些关于如何针对现有对象(用于编辑页面)使用验证器的指导吗?
最佳答案
验证适用于各种情况,但使用 @ensure 装饰器只能用于声明简单属性的规则(就像您发现的那样)。
因此...
选项a:用流畅的API“ensure”方法替换ensure装饰器,这支持“嵌套”或“复杂”绑定(bind)路径,例如:
import {Validation} from 'aurelia-validation';
import {ItemService} from './service';
export class EditItem {
static inject() {
return [Validation, ItemService];
}
constructor(validation, service) {
this.validation = validation.on(this)
.ensure('item.url')
.isNotEmpty()
.hasMinLength(10)
.matches(/^https?:\/\/.{3,}$/) //looks like a url
.matches(/^\S*$/)
.ensure('item.name')
.isNotEmpty()
.hasLengthBetween(3,10);
this.service = service;
this.item = null;
}
activate(params){
return this.service.getItem(params.id).then(res => {
console.log(res);
this.item = res.content; //populate with object from api call
});
}
update() {
this.validation.validate().then(
() => {
var data = {
name: this.item.name,
url: this.item.url
};
this.service.updateItem(data).then(res => {
this.message = "Thank you!";
})
}
);
}
}
注意:您甚至可以在设置项目之前设置验证。很酷,不是吗?
选项 b:由于验证规则特定于项目,因此您可以使用该类中的 @ensure 装饰器将验证规则移动到项目类中。
然后,您可以在检索项目后在虚拟机中设置验证:this.validation = validation.on(this.item);
或者,您的服务可以在返回您的项目时设置验证。 item 到您的虚拟机并使其成为模型的固有部分:item.validation =validation.on(item);
选项 a 最简单,似乎符合您的经验。选项 b 更易于维护,因为模型的验证规则将存在于模型上,而不是 View 模型上。但是,如果您选择选项 b,you might have to adjust your HTML a bit to make sure validation hints appear .
关于decorator - 如何使用 aurelia-validate 与对象属性进行验证?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30518642/