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Add blog post for config_entry unique_id collision warning #2467

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@epenet epenet commented Nov 21, 2024

Proposed change

Linked to home-assistant/core#130567

Type of change

  • Document existing features within Home Assistant
  • Document new or changing features which there is an existing pull request elsewhere
  • Spelling or grammatical corrections, or rewording for improved clarity
  • Changes to the backend of this documentation
  • Removed stale or deprecated documentation

Additional information

Summary by CodeRabbit

  • New Features

    • Introduced updated documentation on handling unique IDs in config flows.
  • Documentation

    • Added guidance on managing unique ID collisions and user options for manual flows.

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coderabbitai bot commented Nov 21, 2024

📝 Walkthrough

Walkthrough

The documentation introduces changes to the handling of unique IDs in config flows for Home Assistant integrations. The key modification addresses the previous behavior of automatically replacing existing entries when a unique ID collision occurs. The new guidance recommends that integrations should instead abort the config flow and provide more user-friendly options for handling such scenarios, such as reauthentication or reconfiguration.

Changes

File Change Summary
blog/2024-12-19-config-flow-unique-id.md New documentation explaining updated best practices for managing unique ID conflicts in config flows

The changes are purely documentational, providing guidance for integration developers on handling unique ID collisions in configuration flows more robustly and user-consciously.

Sequence Diagram

sequenceDiagram
    participant User
    participant ConfigFlow
    participant Integration
    
    User->>ConfigFlow: Initiate config flow
    ConfigFlow->>Integration: Check unique ID
    alt Unique ID Collision Detected
        Integration-->>ConfigFlow: Abort flow
        ConfigFlow->>User: Provide options
        User->>ConfigFlow: Choose action (reauth/reconfigure)
    else No Collision
        Integration->>ConfigFlow: Create entry
        ConfigFlow->>User: Configuration complete
    end
Loading

This sequence diagram illustrates the recommended approach for handling unique ID conflicts in config flows, emphasizing user interaction and controlled flow management.


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Actionable comments posted: 1

🧹 Outside diff range and nitpick comments (3)
blog/2024-11-22-config-flow-unique-id (3)

1-5: Adjust title formatting in front matter

The title should follow sentence-style capitalization and doesn't need quotes.

-title: "New checks for config flow unique ID"
+title: New checks for config flow unique ID

13-13: Fix typo in conditional statement

There's a typo in the conditional statement.

-it it was intentional
+if it was intentional

7-14: Enhance content structure and clarity

Consider restructuring the content to make the warning implications and recommended actions more prominent:

 ### Summary of changes
-When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
-This can lead to unexpected behavior, and will now log a warning.
+Starting with this release, Home Assistant will log a warning when a config flow creates an entry with a colliding unique ID. Previously, the old entry was silently removed and replaced with the new config entry, which could lead to unexpected behavior.
 
-The integration should carefully consider whether this was intentional or accidental:
+### Required actions
+Integration developers must determine if unique ID collisions are intentional:
 
-if it was accidental, the integration should probably be updated to use `self._abort_if_unique_id_configured`
-it it was intentional, the integration should probably be migrated to use a reconfigure flow and use `self.async_update_reload_and_abort`
+For accidental collisions:
+- Update the integration to use `self._abort_if_unique_id_configured`
+
+For intentional collisions:
+- Migrate to a reconfigure flow using `self.async_update_reload_and_abort`
📜 Review details

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Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between 7d40b08 and b93b030.

📒 Files selected for processing (1)
  • blog/2024-11-22-config-flow-unique-id (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
blog/2024-11-22-config-flow-unique-id (6)

Pattern */**(html|markdown|md): - For instructional content in documentation, use a direct and authoritative tone. Avoid expressions of politeness such as 'may' or 'please', and ensure the goal of the instruction is fronted.

  • Apply the Microsoft Style Guide to ensure documentation maintains clarity and conciseness.
  • In step-by-step instructions, front the location phrase in the instructional sentence.
  • In step-by-step instructions, front the 'goal' in the instructional sentence.
  • In step-by-step instructions, if in doubt what to front, front the 'goal' before the location phrase in the instructional sentence.
  • do not hyphenate terms like 'top-right' or 'bottom-left' with 'corner'

Pattern */**(html|markdown|md): - Use bold to mark UI strings.

  • If "" are used to mark UI strings, replace them by bold.

Pattern */**(html|markdown|md): - Be brief in your replies and don't add fluff like "thank you for..." and "Please let me know if"


Pattern */**(html|markdown|md): - Use sentence-style capitalization also in headings.


Pattern */**(html|markdown|md): do not comment on HTML used for icons


Pattern */**(html|markdown|md): Avoid flagging inline HTML for embedding videos in future reviews for this repository.

- if it was accidental, the integration should probably be updated to use `self._abort_if_unique_id_configured`
- it it was intentional, the integration should probably be migrated to use a reconfigure flow and use `self.async_update_reload_and_abort`

More details can be found in the [config flow](/docs/config_entries_config_flow_handler#unique-id-requirements) documentation.
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💡 Codebase verification

Link needs to be updated to point to the correct section

The documentation file exists but the anchor should be "unique-ids" instead of "unique-id-requirements". The correct link should be /docs/config_entries_config_flow_handler#unique-ids.

🔗 Analysis chain

Verify documentation link validity

The link to the config flow documentation needs verification to ensure it points to the correct section.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the existence of the linked documentation file and section

# Check if the documentation file exists
fd -t f "config_entries_config_flow_handler.md" docs/

# Check for the unique-id-requirements section in the file
rg -l "unique-id-requirements" docs/

Length of output: 280


Script:

#!/bin/bash
# Let's check the content of config_entries_config_flow_handler.md to see if it has a relevant section
# that might be using a different anchor/heading

rg -A 5 -i "unique.?id" docs/config_entries_config_flow_handler.md

Length of output: 6577

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Actionable comments posted: 1

🧹 Outside diff range and nitpick comments (2)
blog/2024-11-22-config-flow-unique-id.md (2)

1-5: Remove quotes from the title

The title should be more direct and doesn't require quotation marks.

-title: "New checks for config flow unique ID"
+title: New checks for config flow unique ID

9-10: Make the tone more direct and authoritative

The current wording could be more direct. Consider restructuring for clarity.

-When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
-This can lead to unexpected behavior, and will now log a warning.
+Config flows creating entries with colliding unique IDs automatically remove and replace existing entries.
+The system now logs a warning for this potentially unexpected behavior.
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between b93b030 and 1feb5e9.

📒 Files selected for processing (1)
  • blog/2024-11-22-config-flow-unique-id.md (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
blog/2024-11-22-config-flow-unique-id.md (6)

Pattern */**(html|markdown|md): - For instructional content in documentation, use a direct and authoritative tone. Avoid expressions of politeness such as 'may' or 'please', and ensure the goal of the instruction is fronted.

  • Apply the Microsoft Style Guide to ensure documentation maintains clarity and conciseness.
  • In step-by-step instructions, front the location phrase in the instructional sentence.
  • In step-by-step instructions, front the 'goal' in the instructional sentence.
  • In step-by-step instructions, if in doubt what to front, front the 'goal' before the location phrase in the instructional sentence.
  • do not hyphenate terms like 'top-right' or 'bottom-left' with 'corner'

Pattern */**(html|markdown|md): - Use bold to mark UI strings.

  • If "" are used to mark UI strings, replace them by bold.

Pattern */**(html|markdown|md): - Be brief in your replies and don't add fluff like "thank you for..." and "Please let me know if"


Pattern */**(html|markdown|md): - Use sentence-style capitalization also in headings.


Pattern */**(html|markdown|md): do not comment on HTML used for icons


Pattern */**(html|markdown|md): Avoid flagging inline HTML for embedding videos in future reviews for this repository.

🪛 LanguageTool
blog/2024-11-22-config-flow-unique-id.md

[grammar] ~14-~14: It seems you either mean “if it”, “it” or there is a comma missing.
Context: ...self._abort_if_unique_id_configured - it it was intentional, the integration should...

(IT_IT)

Comment on lines 12 to 14
The integration should carefully consider whether this was intentional or accidental:
- if it was accidental, the integration should probably be updated to use `self._abort_if_unique_id_configured`
- it it was intentional, the integration should probably be migrated to use a reconfigure flow and use `self.async_update_reload_and_abort`
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⚠️ Potential issue

Fix typo and format technical terms

There's a typo in the conditional statement, and technical terms should use code formatting.

-The integration should carefully consider whether this was intentional or accidental:
-- if it was accidental, the integration should probably be updated to use `self._abort_if_unique_id_configured`
-- it it was intentional, the integration should probably be migrated to use a reconfigure flow and use `self.async_update_reload_and_abort`
+Integrations must evaluate if the collision is intentional:
+- If accidental: Update the integration to use `self._abort_if_unique_id_configured`
+- If intentional: Migrate to use a `reconfigure` flow with `self.async_update_reload_and_abort`
📝 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. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
The integration should carefully consider whether this was intentional or accidental:
- if it was accidental, the integration should probably be updated to use `self._abort_if_unique_id_configured`
- it it was intentional, the integration should probably be migrated to use a reconfigure flow and use `self.async_update_reload_and_abort`
Integrations must evaluate if the collision is intentional:
- If accidental: Update the integration to use `self._abort_if_unique_id_configured`
- If intentional: Migrate to use a `reconfigure` flow with `self.async_update_reload_and_abort`
🧰 Tools
🪛 LanguageTool

[grammar] ~14-~14: It seems you either mean “if it”, “it” or there is a comma missing.
Context: ...self._abort_if_unique_id_configured - it it was intentional, the integration should...

(IT_IT)

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between 1feb5e9 and 9fbb0d7.

📒 Files selected for processing (1)
  • blog/2024-11-22-config-flow-unique-id.md (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
blog/2024-11-22-config-flow-unique-id.md (6)

Pattern */**(html|markdown|md): - For instructional content in documentation, use a direct and authoritative tone. Avoid expressions of politeness such as 'may' or 'please', and ensure the goal of the instruction is fronted.

  • Apply the Microsoft Style Guide to ensure documentation maintains clarity and conciseness.
  • In step-by-step instructions, front the location phrase in the instructional sentence.
  • In step-by-step instructions, front the 'goal' in the instructional sentence.
  • In step-by-step instructions, if in doubt what to front, front the 'goal' before the location phrase in the instructional sentence.
  • do not hyphenate terms like 'top-right' or 'bottom-left' with 'corner'

Pattern */**(html|markdown|md): - Use bold to mark UI strings.

  • If "" are used to mark UI strings, replace them by bold.

Pattern */**(html|markdown|md): - Be brief in your replies and don't add fluff like "thank you for..." and "Please let me know if"


Pattern */**(html|markdown|md): - Use sentence-style capitalization also in headings.


Pattern */**(html|markdown|md): do not comment on HTML used for icons


Pattern */**(html|markdown|md): Avoid flagging inline HTML for embedding videos in future reviews for this repository.

🪛 LanguageTool
blog/2024-11-22-config-flow-unique-id.md

[misspelling] ~13-~13: This expression is normally spelled as one or with a hyphen.
Context: ...the user to change settings. In case of non user visible flows, the integration should o...

(EN_COMPOUNDS_NON_USER)

🔇 Additional comments (2)
blog/2024-11-22-config-flow-unique-id.md (2)

1-5: LGTM!

The frontmatter follows the documentation guidelines and provides clear metadata.


15-15: LGTM!

The documentation link is properly formatted and references the relevant section.

Comment on lines 9 to 14
When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.

In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
In case of non user visible flows, the integration should optionally update the existing entry before aborting.

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🛠️ Refactor suggestion

Improve clarity and formatting of the summary section

The content needs to be more direct and properly formatted:

Apply these changes to improve clarity and follow documentation guidelines:

-When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
-This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.
+Config flows with colliding unique IDs automatically remove and replace existing entries with new ones.
+To prevent unexpected behavior, integrations must abort the flow when detecting a collision.

-In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
-In case of non user visible flows, the integration should optionally update the existing entry before aborting.
+For manual flows:
+- Implement `options`, `reauth`, or `reconfigure` flows to allow setting changes
+
+For non-user-visible flows:
+- Update the existing entry before aborting (optional)

Changes:

  • Used more direct language ("must" instead of "should")
  • Added proper hyphenation for "non-user"
  • Improved structure with bullet points
  • Made technical terms more prominent
📝 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. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.
In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
In case of non user visible flows, the integration should optionally update the existing entry before aborting.
Config flows with colliding unique IDs automatically remove and replace existing entries with new ones.
To prevent unexpected behavior, integrations must abort the flow when detecting a collision.
For manual flows:
- Implement `options`, `reauth`, or `reconfigure` flows to allow setting changes
For non-user-visible flows:
- Update the existing entry before aborting (optional)
🧰 Tools
🪛 LanguageTool

[misspelling] ~13-~13: This expression is normally spelled as one or with a hyphen.
Context: ...the user to change settings. In case of non user visible flows, the integration should o...

(EN_COMPOUNDS_NON_USER)

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Actionable comments posted: 2

🧹 Nitpick comments (1)
blog/2024-12-19-config-flow-unique-id.md (1)

7-8: Use a more descriptive heading

Replace "Summary of changes" with a more specific heading that describes the content, such as "Changes to unique ID collision handling".

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 9fbb0d7 and 19a03ba.

📒 Files selected for processing (1)
  • blog/2024-12-19-config-flow-unique-id.md (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
blog/2024-12-19-config-flow-unique-id.md (6)

Pattern */**(html|markdown|md): - For instructional content in documentation, use a direct and authoritative tone. Avoid expressions of politeness such as 'may' or 'please', and ensure the goal of the instruction is fronted.

  • Apply the Microsoft Style Guide to ensure documentation maintains clarity and conciseness.
  • In step-by-step instructions, front the location phrase in the instructional sentence.
  • In step-by-step instructions, front the 'goal' in the instructional sentence.
  • In step-by-step instructions, if in doubt what to front, front the 'goal' before the location phrase in the instructional sentence.
  • do not hyphenate terms like 'top-right' or 'bottom-left' with 'corner'

Pattern */**(html|markdown|md): - Use bold to mark UI strings.

  • If "" are used to mark UI strings, replace them by bold.

Pattern */**(html|markdown|md): - Be brief in your replies and don't add fluff like "thank you for..." and "Please let me know if"


Pattern */**(html|markdown|md): - Use sentence-style capitalization also in headings.


Pattern */**(html|markdown|md): do not comment on HTML used for icons


Pattern */**(html|markdown|md): Avoid flagging inline HTML for embedding videos in future reviews for this repository.

🪛 LanguageTool
blog/2024-12-19-config-flow-unique-id.md

[misspelling] ~13-~13: This expression is normally spelled as one or with a hyphen.
Context: ...the user to change settings. In case of non user visible flows, the integration should o...

(EN_COMPOUNDS_NON_USER)

🔇 Additional comments (2)
blog/2024-12-19-config-flow-unique-id.md (2)

1-5: LGTM!

The frontmatter is well-structured and follows the documentation guidelines.


15-15: LGTM!

The documentation link is correctly formatted and provides appropriate reference material.

Comment on lines +9 to +10
When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.
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🛠️ Refactor suggestion

Make the statement more direct and authoritative

Revise for a more direct tone per style guidelines:

-When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
-This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.
+Config flows previously replaced existing entries automatically when encountering a unique ID collision.
+To prevent unexpected behavior, integrations must now abort the flow when detecting a collision.
📝 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. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.
Config flows previously replaced existing entries automatically when encountering a unique ID collision.
To prevent unexpected behavior, integrations must now abort the flow when detecting a collision.

Comment on lines +12 to +13
In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
In case of non user visible flows, the integration should optionally update the existing entry before aborting.
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🛠️ Refactor suggestion

Fix compound word and improve clarity

The sentence structure needs improvement and "non user visible" should be hyphenated:

-In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
-In case of non user visible flows, the integration should optionally update the existing entry before aborting.
+For manual flows, integrations must implement options for reauthorization and reconfiguration.
+For non-user-visible flows, integrations must update the existing entry before aborting.
📝 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. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
In case of non user visible flows, the integration should optionally update the existing entry before aborting.
For manual flows, integrations must implement options for reauthorization and reconfiguration.
For non-user-visible flows, integrations must update the existing entry before aborting.
🧰 Tools
🪛 LanguageTool

[misspelling] ~13-~13: This expression is normally spelled as one or with a hyphen.
Context: ...the user to change settings. In case of non user visible flows, the integration should o...

(EN_COMPOUNDS_NON_USER)

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