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refactor: replace hardcoded serialization constants with getter functions (#8616)

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* refactor: move serialization length limits to settings and use cached getters

* refactor: replace hardcoded serialization limits with dynamic settings-based values

* refactor: replace hardcoded serialization constants with getter functions

* 📝 Add docstrings to `move-max-consts-to-settings` (#8617)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

* fix:  improve docstring formatting

* fix: ensure flow_id is UUID type when creating vertex build record

* docs: enhance docstrings for max_text_length and max_items_length in Settings class

Updated the docstrings for max_text_length and max_items_length to clarify their purpose and behavior regarding UI display and truncation.

* docs: add LANGFLOW_MAX_ITEMS_LENGTH and LANGFLOW_MAX_TEXT_LENGTH environment variables

Introduced new environment variables to configure the maximum number of items and text length displayed in the UI. Updated documentation to reflect these changes and their impact on UI truncation behavior.

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
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Gabriel Luiz Freitas Almeida 2025-06-18 13:34:25 -03:00 • committed by GitHub
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7 changed files with 123 additions and 27 deletions
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10
docs/docs/Configuration/environment-variables.md
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@ -75,6 +75,8 @@ If it detects a supported environment variable, then it automatically adopts the
LANGFLOW_HOST=localhost
LANGFLOW_LANGCHAIN_CACHE=InMemoryCache
LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000
LANGFLOW_MAX_ITEMS_LENGTH=100
LANGFLOW_MAX_TEXT_LENGTH=1000
LANGFLOW_LOG_LEVEL=error
LANGFLOW_OPEN_BROWSER=false
LANGFLOW_PORT=7860
@ -202,6 +204,8 @@ The following table lists the environment variables supported by Langflow.
| <Link id="LANGFLOW_LOG_FILE"/><span class="env-prefix">LANGFLOW_</span>LOG_FILE | String | Not set | Path to the log file. If this option is not set, logs are written to stdout. |
| <Link id="LANGFLOW_LOG_RETRIEVER_BUFFER_SIZE"/><span class="env-prefix">LANGFLOW_</span>LOG_RETRIEVER_BUFFER_SIZE | Integer | `10000` | Set the buffer size for log retrieval. Only used if `LANGFLOW_ENABLE_LOG_RETRIEVAL` is enabled. |
| <Link id="LANGFLOW_MAX_FILE_SIZE_UPLOAD"/><span class="env-prefix">LANGFLOW_</span>MAX_FILE_SIZE_UPLOAD | Integer | `100` | Set the maximum file size for the upload in megabytes.<br/>See [`--max-file-size-upload` option](./configuration-cli.md#run-max-file-size-upload). |
| <Link id="LANGFLOW_MAX_ITEMS_LENGTH"/><span class="env-prefix">LANGFLOW_</span>MAX_ITEMS_LENGTH | Integer | `100` | Maximum number of items to store and display in the UI. Lists longer than this will be truncated when displayed in the UI. Does not affect data passed between components nor outputs. |
| <Link id="LANGFLOW_MAX_TEXT_LENGTH"/><span class="env-prefix">LANGFLOW_</span>MAX_TEXT_LENGTH | Integer | `1000` | Maximum number of characters to store and display in the UI. Responses longer than this will be truncated when displayed in the UI. Does not truncate responses between components nor outputs. |
| <Link id="LANGFLOW_MCP_SERVER_ENABLED"/><span class="env-prefix">LANGFLOW_</span>MCP_SERVER_ENABLED | Boolean | `true` | If this option is set to False, Langflow does not enable the MCP server. |
| <Link id="LANGFLOW_MCP_SERVER_ENABLE_PROGRESS_NOTIFICATIONS"/><span class="env-prefix">LANGFLOW_</span>MCP_SERVER_ENABLE_PROGRESS_NOTIFICATIONS | Boolean | `false` | If this option is set to True, Langflow sends progress notifications in the MCP server. |
| <Link id="LANGFLOW_NEW_USER_IS_ACTIVE"/><span class="env-prefix">LANGFLOW_</span>NEW_USER_IS_ACTIVE | Boolean | `false` | When enabled, new users are automatically activated and can log in without requiring explicit activation by the superuser. |
@ -259,6 +263,8 @@ LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5
LANGFLOW_HOST=localhost
LANGFLOW_LANGCHAIN_CACHE=InMemoryCache
LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000
LANGFLOW_MAX_ITEMS_LENGTH=100
LANGFLOW_MAX_TEXT_LENGTH=1000
LANGFLOW_LOG_LEVEL=error
LANGFLOW_OPEN_BROWSER=false
LANGFLOW_PORT=7860
@ -298,6 +304,8 @@ Environment="LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5"
Environment="LANGFLOW_HOST=localhost"
Environment="LANGFLOW_LANGCHAIN_CACHE=InMemoryCache"
Environment="LANGFLOW_MAX_FILE_SIZE_UPLOAD=10000"
Environment="LANGFLOW_MAX_ITEMS_LENGTH=100"
Environment="LANGFLOW_MAX_TEXT_LENGTH=1000"
Environment="LANGFLOW_LOG_ENV=container_json"
Environment="LANGFLOW_LOG_FILE=logs/langflow.log"
Environment="LANGFLOW_LOG_LEVEL=error"
@ -344,6 +352,8 @@ Create or edit the `.vscode/tasks.json` file in your project root:
"LANGFLOW_HOST": "localhost",
"LANGFLOW_LANGCHAIN_CACHE": "InMemoryCache",
"LANGFLOW_MAX_FILE_SIZE_UPLOAD": "10000",
"LANGFLOW_MAX_ITEMS_LENGTH": "100",
"LANGFLOW_MAX_TEXT_LENGTH": "1000",
"LANGFLOW_LOG_ENV": "container_csv",
"LANGFLOW_LOG_FILE": "langflow.log",
"LANGFLOW_LOG_LEVEL": "error",