Setting up validators for an entire FormGroup in Angular ReactiveForms can be achieved by iterating through the

Question

Setting up validators for an entire FormGroup in Angular ReactiveForms can be achieved by iterating through the

In my current project, I am dealing with a complex form that includes multiple fields.

For each field, I have implemented various validators to ensure data integrity. For example, for the 'surname' field, I have the following validators:

this.surname = new FormControl('', [
      Validators.pattern(/^([a-zA-Z0-9]+[_.\- /\\]{0,1})*([a-zA-Z0-9]+)$/i),
      Validators.minLength(3),
      Validators.maxLength(30),
      Validators.required
    ]);

Applying these validators individually for each field is repetitive and time-consuming. Is there a way to streamline this process and apply the same set of rules to all fields at once? I attempted to use the following code snippet:

formGroupName.setValidators([Validators.required]);

However, this approach did not yield the desired results.

angular typescript angular-reactive-forms

Answer 1

Answer №1

Here are two ways to set validators:

1. Utilize an auxiliary variable

const validationRules=[
      Validators.pattern(/^([a-zA-Z0-9]+[_.\- /\\]{0,1})*([a-zA-Z0-9]+)$/i),
      Validators.minLength(3),
      Validators.maxLength(30),
      Validators.required
    ]
this.surname = new FormControl('', validationRules)

2. Implement setValidator method to iterate through the controls

Object.keys(this.form).forEach(key=>{
     this.form.get(key).setValidators(Validators.required)
}

Answer 2

Here are two ways to set validators:

1. Utilize an auxiliary variable

const validationRules=[
      Validators.pattern(/^([a-zA-Z0-9]+[_.\- /\\]{0,1})*([a-zA-Z0-9]+)$/i),
      Validators.minLength(3),
      Validators.maxLength(30),
      Validators.required
    ]
this.surname = new FormControl('', validationRules)

2. Implement setValidator method to iterate through the controls

Object.keys(this.form).forEach(key=>{
     this.form.get(key).setValidators(Validators.required)
}

Answer 3

Answer №2

When working with the FormGroup in Angular, you have the option to include a validator as a second parameter. In this case, you can provide an array of asynchronous validator functions. Here's an example:

Give this a shot:

this.form.group({
      lastName: ['', ],
      firstName: ['', ]
    },{
      validator: [Validators.required]
    });

Answer 4

When working with the FormGroup in Angular, you have the option to include a validator as a second parameter. In this case, you can provide an array of asynchronous validator functions. Here's an example:

Give this a shot:

this.form.group({
      lastName: ['', ],
      firstName: ['', ]
    },{
      validator: [Validators.required]
    });

Setting up validators for an entire FormGroup in Angular ReactiveForms can be achieved by iterating through the

Answer №1

Answer №2

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