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If ngModel is used within a form tag, either the name attribute must be set or the form control must
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0.背景
angular项目，用的NG-ZORRO
一个简单的表单提交页面，本来不想用form，直接写的row和col。但是页面太丑了，加上form吧，开始报错（其实就是不熟练）。
1.报错原因及解决方法
我的当时的非主流代码如下：
<form nz-form> <nz-row> <nz-col nzSpan="12"> <nz-form-item> <nz-form-label [nzSm]="6" [nzXs]="24" nzFor="region">地区</nz-form-label> <nz-form-control [nzSm]="18" [nzXs]="24"> <input nz-input [(ngModel)]="tableData.region" formControlName="region" placeholder="地区" id="region"/> </nz-form-control> </nz-form-item> </nz-col> <nz-col nzSpan="12"> <nz-form-item> <nz-form-label [nzSm]="6" [nzXs]="24" nzFor="lawCode">项目名称</nz-form-label> <nz-form-control [nzSm]="18" [nzXs]="24"> <input nz-input [(ngModel)]="tableData.lawCode" formControlName="lawCode" placeholder="项目名称" id="lawCode"/> </nz-form-control> </nz-form-item> </nz-col> </nz-row> </form>一开始直接用的input，后来觉得不好看，改成form后，开始报下面的错：
formControlName must be used with a parent formGroup directive. You'll want to add a formGroup directive and pass it an existing FormGroup instance (you can create one in your class).我想了想我这个非主流代码，于是就把formControlName给删除了，结果报错：
If ngModel is used within a form tag, either the name attribute must be set or the form<br>control must be defined as 'standalone' in ngModelOptions.大概的意思是，如果你要在form中使用ngModel，必须定义stanalone。好吧，终于根据提示加上了代码。
<form nz-form> <nz-row> <nz-col nzSpan="12"> <nz-form-item> <nz-form-label [nzSm]="6" [nzXs]="24" nzFor="region">地区</nz-form-label> <nz-form-control [nzSm]="18" [nzXs]="24"> <input nz-input [(ngModel)]="tableData.region" [ngModelOptions]="{standalone: true}" placeholder="地区" id="region"/> </nz-form-control> </nz-form-item> </nz-col> <nz-col nzSpan="12"> <nz-form-item> <nz-form-label [nzSm]="6" [nzXs]="24" nzFor="lawCode">项目名称</nz-form-label> <nz-form-control [nzSm]="18" [nzXs]="24"> <input nz-input [(ngModel)]="tableData.lawCode" [ngModelOptions]="{standalone: true}" placeholder="项目名称" id="lawCode"/> </nz-form-control> </nz-form-item> </nz-col> </nz-row> </form>这样表单就好看多了。
标签：control,used,form,ngModel,set,报错,must 来源： https://www.cnblogs.com/longkui-site/p/15860455.html