用字符串修补值

Question

如何用字符串修补字段值？由于某些原因，此操作无效：

test = "myForm.controls.graphicUrl";
this[test].patchValue("hello");

Answer 1

尝试这样：

this.myForm.controls[graphicUrl].patchValue("hello");

Answer 2

我认为这是您要寻找的： https://angular.io/api/forms/AbstractControl#get

如果您有多个FormGroup，请考虑制作一个根FormGroup

this.rootForm = this.fb.build({
    myForm:this.myForm,
    otherForm:this.otherForm
})
//then from your example:
const dotSeparatedPath = "myForm.graphicUrl"
this.rootForm.get(dotSeparatedPath).patchValue("hello")
//you can also pass an object as a parameter to the whole rootForm
const formValues= {
    myForm:{
        graphicUrl:"hello"
    }
}
/* only graphUrl will be changes since the other keys in the object are not defined. */
this.rootForm.patchValue(formValues)