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@ArgoZhang ArgoZhang commented Jun 25, 2025

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fixes #6303

Summary By Copilot

Regression?

  • Yes
  • No

Risk

  • High
  • Medium
  • Low

Verification

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  • Automated

Packaging changes reviewed?

  • Yes
  • No
  • N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

  • Doc is updated/provided or not needed
  • Demo is updated/provided or not needed
  • Merge the latest code from the main branch

Summary by Sourcery

Enable default selection of a pre-marked active item in the Select component when its Value is null by adding the IsUseActiveWhenValueIsNull parameter, updating the change handling logic, and validating the behavior with a new unit test.

New Features:

  • Add IsUseActiveWhenValueIsNull parameter to Select component to allow using a pre-marked active item as the initial selection when no value is provided

Enhancements:

  • Refactor selection logic by introducing SetSelectedItemState helper and updating OnChange to respect the new parameter

Tests:

  • Add unit test to verify that the active item is used and the SelectedItemChanged callback is triggered when IsUseActiveWhenValueIsNull is enabled and no value is set

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sourcery-ai bot commented Jun 25, 2025

Reviewer's Guide

Introduces a new IsUseActiveWhenValueIsNull parameter in the Select component, refactors the change handler to respect this parameter via a SetSelectedItemState helper, and adds a unit test to verify the new behavior.

Sequence diagram for Select OnChange logic with IsUseActiveWhenValueIsNull

sequenceDiagram
    participant User as actor User
    participant Select as Select<TValue>
    participant Item as SelectedItem
    User->>Select: Triggers OnChange(args)
    alt Value is null
        alt IsUseActiveWhenValueIsNull && !IsVirtualize
            Select->>Select: SetSelectedItemState(GetItemByRows())
        else
            Select->>Select: return null
        end
    else Value is not null
        Select->>Select: GetItemByVirtualized() or GetItemByRows()
        Select->>Select: SetSelectedItemState(item)
    end
    Select-->>User: (state updated)
Loading

File-Level Changes

Change Details Files
Add IsUseActiveWhenValueIsNull boolean parameter to Select
  • Declared public Parameter property with XML documentation
  • Default value false, opt-in behavior
src/BootstrapBlazor/Components/Select/Select.razor.cs
Refactor OnChange logic to use new parameter and extract selection logic
  • Modify empty-value branch to return SetSelectedItemState when flag is true
  • Always call SetSelectedItemState for non-null items
  • Centralize item-selection state updates
src/BootstrapBlazor/Components/Select/Select.razor.cs
Add unit test for active-when-null behavior
  • Created IsUseActiveWhenValueNull_Ok test method
  • Configure component with Items, active flag, and new parameter
  • Assert initial selection callback and rendered markup
test/UnitTest/Components/SelectTest.cs

Assessment against linked issues

Issue Objective Addressed Explanation
#6303 Add IsUseActiveWhenValueIsNull parameter to the Select component.

Possibly linked issues


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Getting Help

@bb-auto bb-auto bot added the enhancement New feature or request label Jun 25, 2025
@bb-auto bb-auto bot added this to the 9.7.0 milestone Jun 25, 2025
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Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

  • Consider renaming the IsUseActiveWhenValueIsNull parameter to a more concise form (e.g. UseActiveItemOnNull) for readability and consistency with other bool flags.
  • Right now you only trigger the active‐item logic in the change handler—make sure the active item is also applied on initial render rather than waiting for a change event.
  • Verify that the new active‐when‐null behavior is consistently applied in virtualized mode (e.g. in the GetItemByVirtualized code path) if virtualize support is required.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- Consider renaming the `IsUseActiveWhenValueIsNull` parameter to a more concise form (e.g. `UseActiveItemOnNull`) for readability and consistency with other bool flags.
- Right now you only trigger the active‐item logic in the change handler—make sure the active item is also applied on initial render rather than waiting for a change event.
- Verify that the new active‐when‐null behavior is consistently applied in virtualized mode (e.g. in the `GetItemByVirtualized` code path) if virtualize support is required.

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codecov bot commented Jun 25, 2025

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (10fc77c) to head (3572163).
Report is 1 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff            @@
##              main     #6304   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          714       714           
  Lines        31446     31452    +6     
  Branches      4437      4438    +1     
=========================================
+ Hits         31446     31452    +6     
Flag Coverage Δ
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@ArgoZhang ArgoZhang merged commit 29d02df into main Jun 25, 2025
5 checks passed
@ArgoZhang ArgoZhang deleted the feat-select branch June 25, 2025 06:08
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feat(Select): add IsUseActiveWhenValueIsNull parameter

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