Getting current user in blocks class in Wagtail - django

Question

Using Wagtail 2.9, I am trying to create a block that has a function that generates URL. To generate the URL I need the current logged in user.
class Look(blocks.StructBlock):
title = blocks.CharBlock(required=True, help_text='Add your look title')
id = blocks.CharBlock(required=True, help_text='Enter the Id')
class Meta:
template = "looker/looker_block.html"
value_class = LookStructValue
the value class has the get_url() definition which looks like:
class LookStructValue(blocks.StructValue):
def url(self):
id = self.get('id')
user = User(15,
first_name='This is where is need the current user First name',
last_name='and last name',
permissions=['some_permission'],
models=['some_model'],
group_ids=[2],
external_group_id='awesome_engineers',
user_attributes={"test": "test",
"test_count": "1"},
access_filters={})
url_path = "/embed/looks/" + id
url = URL(user,url_path, force_logout_login=True)
return "https://" + url.to_string()
Can i get the current user inside the LookStructValue class?

Answer 1

You can access the parent's context (parent_context) using the blocks.Structblock's get_context method.
Be sure you render the block with {% include_block %}.
The parent_context keyword argument is available when the block is rendered through an {% include_block %} tag, and is a dict of variables passed from the calling template.
You'd have to rethink how you were creating the user's URL, instead moving it to a method (example: create_custom_url) on the User model.
# Basic Example, to point you the right way.
class DemoBlock(blocks.StructBlock):
title = blocks.CharBlock()
def get_context(self, value, parent_context=None):
"""Add a user's unique URL to the block's context."""
context = super().get_context(value, parent_context=parent_context)
user = parent_context.get('request').user
context['url'] = user.create_custom_url()
return context