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reviewboard.extensions.hooks.ReviewRequestFieldsHook allows extensions to add new fields to a review request. These fields will act like any other field on a review request. They can be edited, saved along with a draft, published, and their history can be shown in the “Review request changed” boxes. Their data can also be accessed through the extra_data fields of Review Request Resource and Review Request Draft Resource.

There are many types of fields that can be created, and developers are encouraged to look at the documentation in reviewboard.reviews.fields for more information on these.

When registering one or more fields through the hook, a fieldset ID must be specified. This can be a custom fieldset registered by the extension, or it can be one of the built-in fieldsets:

  • main - The main fieldset containing Description and Testing Done.
  • info - The Information fieldset on the side.
  • reviewers - The Reviewers fieldset on the side.

Field IDs must be unique, and a field cannot be added to more than one fieldset. It is best to choose a field ID that contains some sort of extension-specific information, such as the vendor or the extension ID.


from reviewboard.extensions.base import Extension
from reviewboard.extensions.hooks import ReviewRequestFieldsHook
from reviewboard.reviews.fields import BaseEditableField

class MilestoneField(BaseEditableField):
    field_id = 'myvendor_milestone'
    label = 'Milestone'

class NotesField(BaseTextAreaField):
    field_id = 'myvendor_notes'
    label = 'Notes'

class SampleExtension(Extension):
    def initialize(self):
        ReviewRequestFieldsHook(self, 'info', [MilestoneField])
        ReviewRequestFieldsHook(self, 'main', [NotesField])