我准备花一天时间研究这个,但我希望你们有答案,否则这将是一整天的事情。
我有以下变量
,
这些变量可能会也可能不会被填充或定义,具体取决于用户输入表单的信息。
我已设置当前的路由器:
inputCity;
inputGuestNumber;
inputCapacitySelected;
inputCuisineSelected;
inputPrivacySelected;
inputVenueTypeSelected;
inputAmenitiesSelected;
inputNeighborhoodSelected;
我这样设置,希望如果onSubmit(){
this.router.navigate(['/venue-list',
this.inputCity], {queryParams:{guestCount: this.inputGuestNumber, countOption: this.inputCapacitySelected,
cuisineSelected:this.inputCuisineSelected, privacySelected:this.inputPrivacySelected,
venueTypeSelected: this.inputVenueTypeSelected, amenitiesSelected: this.inputAmenitiesSelected,
neighborhoodSelected: this.inputNeighborhoodSelected}
});
未定,则会被忽略,而是追加所有查询参数。
所以现在我希望将查询参数附加到queryparams参数,如果使用了查询参数。我不知道该怎么做,并开始我的研究。
默认值是不可接受的,因为它仍然会产生一个粗略的网址。非常感谢你们
答案 0 :(得分:0)
这非常棘手,因为同样存在很多未解决的问题。
git中的一个问题 - https://github.com/angular/angular/issues/12347
您必须拥有可选路由,例如每种查询参数的路由,例如
const routes: Routes = [
{ path: '', component: HomeComponent },
{ path: ':product', component: ProductComponent, resolve: { product: ProductResolver } },
{ path: ':product/:card', component: ProductComponent, resolve: { product: ProductResolver } },
{ path: ':product/:group/:card', component: ProductComponent, resolve: { product: ProductResolver } }];
或者您可以查看我在github上的一个要点中找到的代码。您可以在路由器中使用解析。得到参数并检查。
相同的链接 - https://gist.github.com/e-oz/5a95f50336e68623f9e0
export class UrlParser
{
getParameter(key) {
return this.getParameters()[key];
}
getParameters() {
// http://stackoverflow.com/a/2880929/680786
var match,
pl = /\+/g, // Regex for replacing addition symbol with a space
search = /([^&=]+)=?([^&]*)/g,
decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },
query = window.location.search.substring(1);
let urlParams = {};
while (match = search.exec(query)) {
urlParams[decode(match[1])] = decode(match[2]);
}
return urlParams;
}
setParameter(key:string, value) {
let params = this.getParameters() || {};
if (params[key]==value) {
return true;
}
params[key] = value;
let search = [];
for (let k in params) {
if (params.hasOwnProperty(k)) {
search.push(encodeURIComponent(k)+"="+encodeURIComponent(params[k]));
}
}
let query = '?'+search.join('&');
let history = DOM.getHistory();
if (history && history.replaceState) {
history.replaceState(null, '', location.pathname+query);
} else {
return false;
}
return true;
}
}
<强>更新强>
我认为它已在新路由器中处理,如GIT中的一张门票中所述 - https://github.com/angular/angular/issues/3525
现在可选路由由localhost:3000/heroes;id=15;foo=foo
";"
分隔。
id值在URL中显示为(; id = 15; foo = foo),而不是在URL路径中。 &#34;英雄&#34;的路径路线没有:id令牌。
可选路由参数不用&#34;?&#34;和&#34;&amp;&#34;因为它们将在URL查询字符串中。它们用分号隔开&#34 ;;&#34;这是矩阵URL表示法 - 您可能以前从未见过。
看看此链接可能会有所帮助 - https://angular.io/guide/router#route-parameters-required-or-optional
答案 1 :(得分:0)
我不确定是否有任何简单的方法来有条件地添加参数,除了手动分别通过每个参数。可能更容易的是构建整个对象,然后过滤掉并删除缺少的对象。
onSubmit() {
const queryParams = {
guestCount: this.inputGuestNumber, countOption: this.inputCapacitySelected,
cuisineSelected:this.inputCuisineSelected, privacySelected:this.inputPrivacySelected,
venueTypeSelected: this.inputVenueTypeSelected, amenitiesSelected: this.inputAmenitiesSelected,
neighborhoodSelected: this.inputNeighborhoodSelected
}
Object.keys(queryParams)
.filter(key => queryParams[key] === null || queryParams[key] === undefined)
.forEach(key => delete queryParams[key])
this.router.navigate(['/venue-list', this.inputCity], {queryParams})
}