Long Conversation Variable Descriptions Cause "Internal Server Error" When Editing Chatflow #25540
Description
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Dify version
1.8.1
Cloud or Self Hosted
Cloud
Steps to reproduce
Import the following DSL and edit it.
DSL
app:
description: ''
icon: 🤖
icon_background: '#FFEAD5'
mode: advanced-chat
name: conversation variable desc length
use_icon_as_answer_icon: false
dependencies:
- current_identifier: null
type: marketplace
value:
marketplace_plugin_unique_identifier: langgenius/openai:0.1.0@539dc0dde8ecaa84e61b8eeb154c3bb7fbc9caa80afd83763dd5860a725d2742
kind: app
version: 0.4.0
workflow:
conversation_variables:
- description: =====94a7f93b7d03ac3405c3fb7da00705b65265f3f01620976a2fb22dbeb8e26ea77f1c4a54b052e6c02a5f03cf0a2dcc809dd80771bfe1401a4e7cf99aeae1f8fbf8692750b414ea541caa0c0816cce948f54812a1c33ce48b6d1f98024f103b9bcff6aaca2af723a6cc1c90fd8446db60588ff22a2ea1b443993fec7200a5f46474a9===
id: 091bfe21-8e0e-4f2d-b1ef-5a9429d6b5b5
name: test
selector:
- conversation
- test
value: '1234'
value_type: string
environment_variables: []
features:
file_upload:
allowed_file_extensions:
- .JPG
- .JPEG
- .PNG
- .GIF
- .WEBP
- .SVG
allowed_file_types:
- image
allowed_file_upload_methods:
- local_file
- remote_url
enabled: false
fileUploadConfig:
audio_file_size_limit: 50
batch_count_limit: 5
file_size_limit: 15
image_file_size_limit: 10
video_file_size_limit: 100
workflow_file_upload_limit: 10
image:
enabled: false
number_limits: 3
transfer_methods:
- local_file
- remote_url
number_limits: 3
opening_statement: ''
retriever_resource:
enabled: true
sensitive_word_avoidance:
enabled: false
speech_to_text:
enabled: false
suggested_questions: []
suggested_questions_after_answer:
enabled: false
text_to_speech:
enabled: false
language: ''
voice: ''
graph:
edges:
- data:
sourceType: start
targetType: llm
id: 1757581230524-llm
source: '1757581230524'
sourceHandle: source
target: llm
targetHandle: target
type: custom
- data:
sourceType: llm
targetType: answer
id: llm-answer
source: llm
sourceHandle: source
target: answer
targetHandle: target
type: custom
nodes:
- data:
desc: ''
selected: false
title: Start
type: start
variables: []
height: 54
id: '1757581230524'
position:
x: 80
y: 282
positionAbsolute:
x: 80
y: 282
sourcePosition: right
targetPosition: left
type: custom
width: 244
- data:
context:
enabled: false
variable_selector: []
desc: ''
memory:
query_prompt_template: '{{#sys.query#}}
{{#sys.files#}}'
role_prefix:
assistant: ''
user: ''
window:
enabled: false
size: 10
model:
completion_params:
temperature: 0.7
mode: chat
name: gpt-3.5-turbo-0125
provider: langgenius/openai/openai
prompt_template:
- role: system
text: ''
selected: false
title: LLM
type: llm
variables: []
vision:
enabled: false
height: 90
id: llm
position:
x: 380
y: 282
positionAbsolute:
x: 380
y: 282
sourcePosition: right
targetPosition: left
type: custom
width: 244
- data:
answer: '{{#llm.text#}}'
desc: ''
selected: false
title: Answer
type: answer
variables: []
height: 105
id: answer
position:
x: 680
y: 282
positionAbsolute:
x: 680
y: 282
sourcePosition: right
targetPosition: left
type: custom
width: 244
viewport:
x: 0
y: 0
zoom: 1Problem Description
Currently, conversation variables in Dify have no length limit for their descriptions, allowing users to create variables with arbitrarily long descriptions. However, draft variables are restricted to a maximum of 256 characters.
When fetching draft variables for conversation variables during the drafting process, the system copies conversation variables to draft variables, including their descriptions as-is. Due to this length mismatch, the operation can fail and result in an "Internal Server Error" when attempting to save draft variables.
Additionally, excessively long descriptions may cause performance issues since conversation variable descriptions are stored inline as part of the workflow graph.
✔️ Expected Behavior
No error occurred while editing chatflow.
❌ Actual Behavior
A popup shows while editing chatflow.
