What is the best method for defining validation rules in Vuelidate to ensure a value matches the value of a specific field within an

Question

What is the best method for defining validation rules in Vuelidate to ensure a value matches the value of a specific field within an

Imagine having a Vue component with data structured like this:

  data: () => ({
    form: {
      old_password: {
        data: '',
        type: 'password',
        label: 'Old Password',
      },
      new_password: {
        data: '',
        type: 'password',
        label: 'New Password',
      },
      repeat_password: {
        data: '',
        type: 'password',
        label: 'New Password Confirmation',
      },
    },
  }),

The reason for this specific data format is due to utilizing the ant-design plugin for form building, leaving no room for alternative formats. The data field will hold the actual information.

Moreover, there are validation rules in place for vuelidate as follows:

  validations: {
    form: {
      old_password: {
        data: { required },
      },
      new_password: {
        data: { required },
      },
      repeat_password: {
        data: { sameAsPassword: sameAs('new_password') },
      },
    },
  },

Although the required rule functions correctly, the sameAsPassword rule seems faulty. It consistently displays an error even when using identical passwords. It appears that the comparison is not being made against the correct field. How can I adjust the rule to compare it accurately?

javascript forms vue.js antd vuelidate

Answer 1

Answer №1

repeat_password.data is not a direct sibling of new_password. This information can be found in the official built-in validator documentation.

The locator can either be a sibling property name or a function. If provided as a function, it will receive the model under validation as an argument with access to all properties and methods within the component instance.

Therefore, a function must be passed into the sameAs method:

validations: {
    form: {
      old_password: {
        data: { required },
      },
      new_password: {
        data: { required },
      },
      repeat_password: {
        data: { 
          sameAsPassword: sameAs(function() {
            return this.form.new_password.data;
          }) 
        },
      },
    },
  },

Additionally, to ensure that this properly refers to the component instance inside the function, the data needed to be adjusted from an arrow function to return the correct data values:

data() {
    return {
      form: {
        old_password: {
          data: '',
          type: 'password',
          label: 'Old Password',
        },
        new_password: {
          data: '',
          type: 'password',
          label: 'New Password',
        },
        repeat_password: {
          data: '',
          type: 'password',
          label: 'New Password Confirmation',
        },
      },
    }
  },

Answer 2

repeat_password.data is not a direct sibling of new_password. This information can be found in the official built-in validator documentation.

The locator can either be a sibling property name or a function. If provided as a function, it will receive the model under validation as an argument with access to all properties and methods within the component instance.

Therefore, a function must be passed into the sameAs method:

validations: {
    form: {
      old_password: {
        data: { required },
      },
      new_password: {
        data: { required },
      },
      repeat_password: {
        data: { 
          sameAsPassword: sameAs(function() {
            return this.form.new_password.data;
          }) 
        },
      },
    },
  },

Additionally, to ensure that this properly refers to the component instance inside the function, the data needed to be adjusted from an arrow function to return the correct data values:

data() {
    return {
      form: {
        old_password: {
          data: '',
          type: 'password',
          label: 'Old Password',
        },
        new_password: {
          data: '',
          type: 'password',
          label: 'New Password',
        },
        repeat_password: {
          data: '',
          type: 'password',
          label: 'New Password Confirmation',
        },
      },
    }
  },

Answer 3

Answer №2

First and foremost: using arrow functions for data is not recommended. It's better to define your data like this:

data() {
 return {
   form: {}
 }
}

This approach helps avoid potential context issues.

Additionally, it's uncertain if the data needs to be accessed within validations. Consider structuring your code in this manner:

export default {
  data() {
    return {
      form: {
        nestedA: '',
        nestedB: ''
      }
    }
  },
  validations: {
    form: {
      nestedA: {
        required
      },
      nestedB: {
        required
      }
    }
  }
}

Answer 4

First and foremost: using arrow functions for data is not recommended. It's better to define your data like this:

data() {
 return {
   form: {}
 }
}

This approach helps avoid potential context issues.

Additionally, it's uncertain if the data needs to be accessed within validations. Consider structuring your code in this manner:

export default {
  data() {
    return {
      form: {
        nestedA: '',
        nestedB: ''
      }
    }
  },
  validations: {
    form: {
      nestedA: {
        required
      },
      nestedB: {
        required
      }
    }
  }
}

What is the best method for defining validation rules in Vuelidate to ensure a value matches the value of a specific field within an

Answer №1

Answer №2

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