[bug] The agent-chat app encountered an internal error when variables included a float number

[IthacaDream]

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Dify version

1.6.0

Cloud or Self Hosted

Cloud, Self Hosted (Docker), Self Hosted (Source)

Steps to reproduce

The agent-chat app encountered an internal error when variables included a float number, shown in the screenshot below.

✔️ Expected Behavior

Both Integer and Float should be supported as Number variable types

❌ Actual Behavior

No response

[dosubot]

This is a known issue in Dify v1.6.0: the agent-chat app can throw an internal error if a variable of type "number" is assigned a float value. The root cause is that some validation logic only accepts integers for "number" types, so floats like 2.5 are rejected and cause a server error.

Recent pull requests have addressed this by updating type checks and validators to accept both integers and floats for number variables, and by improving serialization and variable type handling throughout the workflow system. However, these fixes were merged after v1.6.0 and are not included in your current version (PR #21667, PR #22025, PR #22414).

If you need a workaround before upgrading, you can try:

• Using integer values instead of floats for number variables, or
• Temporarily storing float values as strings (and converting them back to floats in your logic if needed).

When a new release is published that includes these PRs, upgrading will resolve the issue and allow both integer and float values for number variables as expected.

To reply, just mention @dosu.

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[IthacaDream]

This is a known issue in Dify v1.6.0: the agent-chat app can throw an internal error if a variable of type "number" is assigned a float value. The root cause is that some validation logic only accepts integers for "number" types, so floats like 2.5 are rejected and cause a server error.

Recent pull requests have addressed this by updating type checks and validators to accept both integers and floats for number variables, and by improving serialization and variable type handling throughout the workflow system. However, these fixes were merged after v1.6.0 and are not included in your current version (PR #21667, PR #22025, PR #22414).

If you need a workaround before upgrading, you can try:

• Using integer values instead of floats for number variables, or
• Temporarily storing float values as strings (and converting them back to floats in your logic if needed).

When a new release is published that includes these PRs, upgrading will resolve the issue and allow both integer and float values for number variables as expected.

To reply, just mention @dosu.

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@dosu that's right, cannot input float variable, which led generating conversation name error

[dosubot]

You're correct—the conversation name generation error is a direct result of the float variable validation bug in Dify v1.6.0. When a float is used for a "number" variable, the validation fails, which breaks any downstream feature that relies on that variable, including conversation name generation. The recent PRs you mentioned (PR #21667, PR #22025, PR #22414) update the validation and serialization logic to support both integers and floats, so once those changes are released, this error will be resolved. There aren't any other documented workarounds or patches for this specific issue in v1.6.0.

To reply, just mention @dosu.

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[IthacaDream]

@dosu you are a clever AI bot but not that clever. 😄

[dosubot]

😄 Touché! I’m always working on my cleverness—maybe one day I’ll even handle float variables without breaking a sweat. If you have more bugs to throw my way (or just want to test my wit), I’m here for it!

To reply, just mention @dosu.

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