如何在 FormArray 中预设反应形式的值？

Question

我有一个带有一些动态场的反应形式。 我正在尝试构建一个 CRUD 操作。 “创建”工作正常但要更新表单我需要预填充字段。 我可以预填充不在“FormArray”中的字段，但因为我正在使用一些动态字段，所以我也想在动态字段中显示数据。

这是我必须预先填充的示例有效负载：`

scriptRunnerData: any = {
    "workflow_name": "vvvv",
    "runnerNodes": [
        {
            "script_name": "sample.py",
            "script_file_content": "jhsvdfhskjdhfvksdj fksjd"
        },
        {
            "script_name": "sample1.py",
            "script_file_content": "sdfjhdsbf sjd fsjd sd dfsb dlfsdjf sd  fls"
        }
    ],
    "executer_command": "dfhdhdjhkdfkdhfg.py",
    "config_name": "config.json",
    "config_file_content": "{\"name\":\"vvvv\"}"
  }

I am passing modes 'create' and 'edit'. Create is working fine but for View I am getting error: I am passing modes 'create' and 'edit'. Create is working fine but for View I am getting error:错误错误：找不到路径控制：'runnerNodes - > 0 - > script_name' and错误错误：找不到路径控制：'runnerNodes - > 0 - > script_file_content'`

这是我的代码：`

createWorkflowAddFormBuilderObj(){
    if(this.data.mode === 'create'){
      console.log("data", this.data);
      this.workflowAddForm = this.formBuilder.group({
        workflow_name: '',
        runnerNodes: this.formBuilder.array([ this.createRunnerNode() ]),
        executer_command: '',
        config_name: '',
        config_file_content: ''
      });
     }else if(this.data.mode === 'edit'){
      this.workflowAddForm = this.formBuilder.group({
        workflow_name: [{value: this.scriptRunnerData.workflow_name, disabled: false}],
        runnerNodes: this.formBuilder.array([ this.createRunnerNode() ]),
        executer_command: [{value: this.scriptRunnerData.executer_command, disabled: false}],
        config_name: [{value: this.scriptRunnerData.config_name, disabled: false}],
        config_file_content: [{value: this.scriptRunnerData.config_file_content, disabled: false}]
      });
    }
    
  }

  createRunnerNode(): FormGroup {
    if(this.data.mode === 'create'){
      return this.formBuilder.group({
        script_name: '',
        script_file_content: ['', Validators.required]
      });
    }else if(this.data.mode === 'edit'){
      this.scriptRunnerData.runnerNodes.forEach(node =>{
        return this.formBuilder.group({
          script_name: [{value: node.script_name, disabled: false}],
          script_file_content: [{value: node.script_file_content, disabled: false}, Validators.required]
        });
      })
    }
  }

  addMoreRunner(){
    this.runnerNodes = this.workflowAddForm.get('runnerNodes') as FormArray;
    this.runnerNodes.push(this.createRunnerNode());
    this.runnerNodeLength = this.runnerNodes.controls.length;
  }

Can anyone please suggest what exactly I have to do. Is Can anyone please suggest what exactly I have to do. Is setValue OR patchValue` 将在这里工作。 如何在这种情况下使用这些方法。 提前致谢。

Answer 1

我修改createWorkflowAddFormBuilderObj()

createWorkflowAddFormBuilderObj(){
    if(this.data.mode === 'create'){
      console.log("data", this.data);
      this.workflowAddForm = this.formBuilder.group({
        workflow_name: '',
        runnerNodes: this.formBuilder.array([ this.createRunnerNode() ]),
        executer_command: '',
        config_name: '',
        config_file_content: ''
      });
     }else if(this.data.mode === 'edit'){
      const controls = this.scriptRunnerData.runnerNodes.map((c) =>
        this.formBuilder.group({
          script_name: [{value: c.script_name, disabled: true}],
          script_file_content: [{value: c.script_file_content, disabled: true}]
        })
      );
      this.workflowAddForm = this.formBuilder.group({
        workflow_name: [{value: this.scriptRunnerData.workflow_name, disabled: true}],
        runnerNodes: this.formBuilder.array(controls),
        executer_command: [{value: this.scriptRunnerData.executer_command, disabled: true}],
        config_name: [{value: this.scriptRunnerData.config_name, disabled: true}],
        config_file_content: [{value: this.scriptRunnerData.config_file_content, disabled: true}]
      });
    }
  }

现在它按预期工作。