send follow immediately

[alphatownsman]

No description provided.

[gemini-code-assist]

Hello @alphatownsman, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

Summary of Changes

This pull request introduces changes to the Follow model and related utilities to manage the state of follow requests more effectively. It adds new fields to the Follow model, specifically state_next_attempt and state_locked_until, and modifies the update_follow_state and follow methods to use a centralized Takahe.update_state method for updating the state of various objects, including Follow objects. This change ensures consistency when updating the state of follow requests.

Highlights

• Model Changes: Adds state_next_attempt and state_locked_until fields to the Follow model in takahe/models.py and the corresponding migration file takahe/migrations/0001_initial.py.
• State Management: Refactors update_follow_state and Takahe.follow in takahe/utils.py to use Takahe.update_state for updating the state of Follow objects, promoting consistency.
• Centralized State Update: Extends Takahe.update_state in takahe/utils.py to handle Follow objects, centralizing state update logic for various models.

Changelog

• takahe/migrations/0001_initial.py
  • Added state_next_attempt field as a DateTimeField with blank=True and null=True (line 916).
  • Added state_locked_until field as a DateTimeField with blank=True, null=True, and db_index=True (lines 918-920).
• takahe/models.py
  • Added state_next_attempt field as a DateTimeField with blank=True and null=True (line 893).
  • Added state_locked_until field as a DateTimeField with null=True, blank=True, and db_index=True (line 894).
• takahe/utils.py
  • Modified update_follow_state to use Takahe.update_state for updating the follow state (line 262).
  • Modified Takahe.follow to use Takahe.update_state when the follow state is not 'accepted' (line 270).
  • Updated Takahe.update_state to include Follow objects in the object type annotation (line 694).

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A follow's state,
A change of time it does await,
Locked until then.

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[gemini-code-assist]

Code Review

The pull request introduces new fields to the Follow model and updates the update_state function to include the Follow model. It also modifies the update_follow_state and follow methods in Takahe to use the update_state function. Overall, the changes seem reasonable, but there are a few points that need clarification and improvement.

Summary of Findings

• Missing documentation for new fields: The pull request adds state_next_attempt and state_locked_until fields to the Follow model, but there is no documentation explaining their purpose or usage. This could make it difficult for other developers to understand and use these fields correctly.
• Potential race condition in update_state: The update_state function updates the state_changed field to timezone.now(). If multiple instances try to update the state at the same time, there could be a race condition, leading to lost updates. Consider using auto_now=True in the model definition or using F expressions to avoid race conditions.

Merge Readiness

The pull request introduces important changes related to follow state management. While the code seems functional, the lack of documentation for the new fields and the potential race condition in update_state need to be addressed before merging. I am unable to approve this pull request, and recommend that it not be merged until those issues are addressed (at a minimum). Please have others review and approve this code before merging.

[gemini-code-assist]

Consider using F expressions to update state_changed to avoid potential race conditions if multiple instances try to update the state at the same time. Alternatively, using auto_now=True in the model definition would automatically update the timestamp on each save.

from django.db.models import F

        obj.state = state
        obj.state_changed = timezone.now()
        obj.state_changed = F('state_changed') # add this line
        obj.save()

[gemini-code-assist]

Consider adding verbose names and help texts to these fields in the model definition as well. This will improve the self-documenting nature of the code.