Django Validators

Django validators provides validator function that can be used with Django form fields and Django rest framework serializer fields

Installation

Install django-validators using pip

pip install django-validators

Types of validators

File validators

• Mime type validator djangovalidators.validators.MimetypeValidator

  This validator is used to check mime type/ content type of the uploaded file. This validator checks file header information to check mime type on FileField

  example

  from djangovalidators.validators import MimetypeValidator
  
  # with django forms
  class DemoForm(forms.Form):
      CONTENT_TYPES = ('image/png', 'application/pdf', 'image/jpeg', 'image/jpg', 'image/tiff',)
      file_object = forms.FileField(validators=[MimetypeValidator(CONTENT_TYPES)])
  
  # with django serializers
  class DemoSerializer(serializers.Serializer):
      CONTENT_TYPES = ('image/png', 'application/pdf', 'image/jpeg', 'image/jpg', 'image/tiff',)
      FILE_SIZE_IN_BYTES = 1024 * 1024 * 5  # ~5 Mib
      file_object = serializers.FileField(validators=[MimetypeValidator(CONTENT_TYPES)])
  

• File size validator djangovalidators.validators.FileSizeValidator

  This validator is useful for validating file size in FileField

  example

  from djangovalidators.validators import FileSizeValidator
  
  # with django forms
  class DemoForm(forms.Form):
      FILE_SIZE_IN_BYTES = 1024 * 1024 * 5  # ~5 Mib
      file_object = forms.FileField(validators=[FileSizeValidator(FILE_SIZE_IN_BYTES)])
  
  # with django serializers
  class DemoSerializer(serializers.Serializer):
      FILE_SIZE_IN_BYTES = 1024 * 1024 * 5  # ~5 Mib
      file_object = serializers.FileField(validators=[FileSizeValidator(FILE_SIZE_IN_BYTES)])