08 n+1 problem #22
08 n+1 problem #22
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WalkthroughThe recent update introduces the Changes
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Review Status
Actionable comments generated: 2
Configuration used: CodeRabbit UI
Files ignored due to path filters (1)
Gemfile.lockis excluded by:!**/*.lock
Files selected for processing (6)
- Gemfile (1 hunks)
- app/controllers/groups_controller.rb (2 hunks)
- app/views/groups/index.html.erb (2 hunks)
- app/views/groups/show.html.erb (2 hunks)
- config/environments/development.rb (1 hunks)
- config/environments/test.rb (1 hunks)
Additional comments: 6
app/views/groups/index.html.erb (1)
- 12-12: Assuming
group.movements_sumis part of an optimization to pre-calculate the sum of movements, this change is a good practice to avoid N+1 queries and improve performance. Ensure thatmovements_sumis correctly calculated in the controller or model to reflect the total sum accurately.app/controllers/groups_controller.rb (2)
- 3-7: The complex query introduced in the
indexmethod to calculatemovements_sumis a good approach to optimize database queries and address the N+1 query problem. Ensure that parameters used in the query are sanitized to avoid SQL injection vulnerabilities.- 32-35: The update to the
destroymethod correctly scopes the group to the current user, which is a security best practice. This ensures that users can only delete groups they own.Gemfile (1)
- 58-58: The addition of the
bulletgem to the development group is a strategic choice to help identify and solve N+1 query problems and unused eager loading. This aligns with the PR's objectives and follows best practices for gem management.config/environments/test.rb (1)
- 9-15: The configuration added for the Bullet gem in the test environment is a proactive approach to identifying and solving N+1 query problems and unused eager loading. Setting
Bullet.raise = trueensures that these issues are caught during testing, aligning with best practices for performance optimization.config/environments/development.rb (1)
- 4-13: The configuration for the Bullet gem in the development environment is well-thought-out, enhancing developer awareness of N+1 queries and unused eager loading in a user-friendly manner. This setup aligns with best practices for performance optimization and developer experience.
app/views/groups/show.html.erb
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| <% if @movements.empty? %> | ||
| <p>There are no movements, yet.</p> | ||
| <% else %> | ||
| <% if @movements.load.any? %> |
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Using .load.any? to check if @movements has any elements forces the loading of all associated records into memory, which might not be efficient if you're only interested in the presence of records. Consider using .exists? instead, which checks for the presence of records without loading them, improving performance.
- <% if @movements.load.any? %>
+ <% if @movements.exists? %>Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation.
| <% if @movements.load.any? %> | |
| <% if @movements.exists? %> |
app/views/groups/index.html.erb
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| <%= link_to "Add a group", new_user_group_path(current_user), class: "button" %> | ||
| <% else %> | ||
| <% @groups.each do |group| %> | ||
| <% if @groups.load.any? %> |
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Similar to the previous file, consider replacing .load.any? with .exists? to check for the presence of groups more efficiently. This avoids loading all records into memory when you only need to know if any records exist.
- <% if @groups.load.any? %>
+ <% if @groups.exists? %>Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation.
| <% if @groups.load.any? %> | |
| <% if @groups.exists? %> |
There was a problem hiding this comment.
Review Status
Actionable comments generated: 0
Configuration used: CodeRabbit UI
Files selected for processing (2)
- app/views/groups/index.html.erb (2 hunks)
- app/views/groups/show.html.erb (2 hunks)
Files skipped from review as they are similar to previous changes (2)
- app/views/groups/index.html.erb
- app/views/groups/show.html.erb
bulletgem for detecting N+1 queries and unused eager loading.Summary by CodeRabbit