43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
import {Page} from '../classes/page';
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import {Observable, of} from 'rxjs';
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/**
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* 判断 一个Page<any>[] 中是否存在一条已查询的数据
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* @param pageNum 页码
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* @param pageSize 单页数量
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* @param pageList 源数据
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* @return 未查到：null 查到：该条数据
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*/
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export function exist<T>(pageNum: number, pageSize: number, pageList: Page<any>[]): Observable<Page<T>> {
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if (pageList === undefined || pageList == null || pageList.length === 0) {
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return null;
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}
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// tslint:disable-next-line:prefer-for-of
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for (let i = 0; i < pageList.length; i++) {
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// tslint:disable-next-line:triple-equals
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if (pageList[i].pageNum == pageNum && pageList[i].pageSize == pageSize) {
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return of<Page<T>>(pageList[i]);
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}
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}
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return null;
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}
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/**
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* 将reqBody对象 转化为拼接到url上面的字符串
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* @param reqBody 请求体 from {a:xx,b:xxx}
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* @return 字符串 to ==> a=xx&b=xxx
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*/
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export function reqBody2Str(reqBody: object): string {
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let submitBody = '';
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for (const key in reqBody) {
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// 跳过值为null的参数请求
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if (reqBody[key] == null || reqBody[key] === 'null') {
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continue;
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}
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submitBody = submitBody + '&' + key + '=' + reqBody[key];
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}
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return submitBody.substring(1);
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}
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