Single Variable Assigner cannot append multiple values to the same array

[kurokobo]

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Dify version

0.14.2

Cloud or Self Hosted

Cloud, Self Hosted (Docker)

Steps to reproduce

1. Create new chatflow app
2. Define new conversation variable with the type array[string]
3. Add Variable Assigner
4. Try Append ing multiple string values to the same conversation variable in the single Variable Assigner

DSL:
variable assigner.txt

Screenshot:

✔️ Expected Behavior

In the above case, the variable bulk should have three values.

❌ Actual Behavior

The variable bulk has only the last appended value.

As a workaround, we can append value one-by-one by adding multiple variable assigner.

[dosubot]

To append multiple values to the same array using a Single Variable Assigner in Dify version 0.14.2, you should use the "Extend" operation mode instead of "Append." The "Extend" operation allows you to add multiple elements to an array in a single operation, effectively solving the issue you're encountering with the "Append" operation, which only adds a single element at a time ^[1][2].

To continue talking to Dosu, mention @dosu.

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[kurokobo]

Note for the comment from the dosubot:

Extend mode is designed to extend the existing array by using another array, so we can't select any string type variables if we select Extend mode.

[laipz8200]

Hi @kurokobo. I fixed this issue in #12672, could you try it?

[kurokobo]

@laipz8200
Thanks, I'll test the PR later 👀