This package aims to simplify the process of injecting validation rules, to your form fields, taking the single responsibility from SOLID Design pattern, Each class of validation represents a validation rule, which can be applied to your inputs. also you can implement your own validation rules.

Features

  • Provide about 16 built-in validations
    • Strings
      • Validating email
      • Validating json
      • Validating required
      • Validating length (Min, Max, Exact)
      • Validating Mobile Phones (Egyptian, Saudi)
      • Validating Regex Pattern
      • Validating Guid
    • Numbers
      • Validating Equal to
      • Validating Not Equal to
      • Validating Not Equal to Zero
      • Validating Range Of

Getting started

 import 'package:enterprise_validator/enterprise_validator.dart';

Usage

Inject Single Validation Rule


     // assign it directly to a TextFormField validator
     TextFormField(
         validator: IsEmailAddressRule(validationError: 'enter a valid email address')
         );

     // create a reusable instance
     final requiredValidation = IsEmailAddressRule(validationError :'this field is required');

     // again assign it directly to the validator
     TextFormField(validator: requiredValidation);

Inject Multiple Validation Rules

   // Orders of validation matters, the first rule you add, the first validation fires.

  final passwordRules = MultiValidationRules([  
    IsRequiredRule(validationError: 'password is required'),  
    IsMinimumLengthRule(8, validationError: 'password must be at least 8 digits long'),  
    IsValidPatternRule(r'(?=.*?[#?!@$%^&*-])', validationError: 'passwords must have at least one special character')  
 ]);  
  
  String password;  
  
  Form(  
    key: _formKey,  
    child: Column(children: [  
      TextFormField(  
        obscureText: true,  
        onChanged: (val) => password = val,  
        // assign the the multi validation rules to the TextFormField validator  
        validator: passwordRules,  
      ),  
  
      // using the match validator to confirm password  
      TextFormField(  
        validator: (val) => MatchRule(validationError: 'passwords do not match').validateMatch(val, password),  
      )  
    ]),  
  );

Additional information

  • This package is still in its initial stage, which means, it may have break changes.
  • This package is a personal attempt to make the process of validation easier, it is open source, you can get the code and add your own custom logic.
  • It's open to contribute and contact with me for any future improvements for the package.

Libraries

enterprise_validator