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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 checks for handling unique IDs in config flows to prevent unintended overwrites of existing entries.
    • Added recommendations for integrations to abort flows on unique ID collisions, enhancing user control over configurations.
  • Documentation

    • Updated guidance on managing unique ID configurations, including options for reauthentication and reconfiguration during manual flows.

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coderabbitai bot commented Nov 21, 2024

📝 Walkthrough
📝 Walkthrough

Walkthrough

The changes introduce a new markdown file that outlines the handling of unique IDs in configuration flows. It addresses the issue of unique ID collisions where a new configuration entry could inadvertently remove an existing one. The document advises integrations to abort the flow upon detecting such collisions and suggests options for reauthentication and reconfiguration for manual flows. Additionally, it recommends updating existing entries in non-user-visible flows before proceeding with the abort.

Changes

File Change Summary
blog/2024-11-22-config-flow-unique-id.md Introduced a new document detailing checks for unique ID handling in config flows, including recommendations for aborting flows and managing collisions.

Sequence Diagram(s)

sequenceDiagram
    participant Integration
    participant ConfigFlow
    participant Logger

    Integration->>ConfigFlow: Attempt to add new config with unique ID
    alt Unique ID collision
        ConfigFlow->>Logger: Log warning about collision
        alt Accidental collision
            ConfigFlow->>Integration: Recommend aborting the flow
        else Intentional collision
            ConfigFlow->>Integration: Recommend updating existing entry before abort
        end
    end
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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

Configuration used: CodeRabbit UI
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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