Fix spel template default expression

[mslabek]

Describe your changes

Checklist before merge

• [ ] Related issue ID is placed at the beginning of PR title in [brackets] (can be GH issue or Nu Jira issue)
• [ ] Code is cleaned from temporary changes and commented out lines
• [ ] Parts of the code that are not easy to understand are documented in the code
• [ ] Changes are covered by automated tests
• [ ] Showcase in dev-application.conf added to demonstrate the feature
• [ ] Documentation added or updated
• [ ] Added entry in Changelog.md describing the change from the perspective of a public distribution user
• [ ] Added MigrationGuide.md entry in the appropriate subcategory if introducing a breaking change
• [ ] Verify that PR will be squashed during merge

Summary by CodeRabbit

• New Features
  • Introduced a default expression for the SpelTemplateParameterEditor, enhancing the user experience by providing a predefined value.
• Bug Fixes
  • Ensured existing logic remains intact for other parameter editors, maintaining stability and reliability.

[coderabbitai[bot]]

📝 Walkthrough

## Walkthrough The changes in the pull request involve an update to the `EditorPossibleValuesBasedDefaultValueDeterminer` object located in the `EditorPossibleValuesBasedDefaultValueDeterminer.scala` file. A new case has been incorporated into the `determineParameterDefaultValue` method specifically for handling the `SpelTemplateParameterEditor`. This addition allows the method to return a default expression of `Expression.spelTemplate("")` when this particular editor type is encountered. The modifications do not alter the existing logic for other parameter editors such as `FixedValuesParameterEditor`, `DualParameterEditor`, `TabularTypedDataEditor`, and `DictParameterEditor`, which continue to function as before. The overall control flow and error handling mechanisms within the method remain unchanged, ensuring that it consistently returns an `Option[Expression]` based on the type of editor provided as a parameter. ## Sequence Diagram(s) ```mermaid sequenceDiagram participant User participant EditorPossibleValuesBasedDefaultValueDeterminer participant Expression User->>EditorPossibleValuesBasedDefaultValueDeterminer: determineParameterDefaultValue(SpelTemplateParameterEditor) EditorPossibleValuesBasedDefaultValueDeterminer-->>Expression: Return Expression.spelTemplate("") User->>EditorPossibleValuesBasedDefaultValueDeterminer: determineParameterDefaultValue(OtherParameterEditor) EditorPossibleValuesBasedDefaultValueDeterminer-->>Expression: Return existing logic for other editors ```

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📜 Recent review details

**Configuration used: CodeRabbit UI** **Review profile: CHILL**

📥 Commits

Reviewing files that changed from the base of the PR and between b4ea6aa2f2fd52ef3d91cefb9fda877b67a0669a and b53d0c26a994ab8ef845b2e8263217f760053f11.

📒 Files selected for processing (1)

* `scenario-compiler/src/main/scala/pl/touk/nussknacker/engine/definition/component/parameter/defaults/EditorPossibleValuesBasedDefaultValueDeterminer.scala` (2 hunks)

🔇 Additional comments (2)

scenario-compiler/src/main/scala/pl/touk/nussknacker/engine/definition/component/parameter/defaults/EditorPossibleValuesBasedDefaultValueDeterminer.scala (2)

`7-7`: **LGTM!** The import is correctly placed and follows the existing import organization pattern. --- `25-26`: **LGTM! The implementation is consistent and well-placed.** The new case for `SpelTemplateParameterEditor` follows the existing pattern of providing sensible defaults, using an empty string as the default template value. The placement before the catch-all case and the implementation style are consistent with the rest of the code. Let's verify that this is the only place where SpelTemplateParameterEditor default values need to be handled:

✅ Verification successful

**The implementation is correctly placed and no other default value handling is needed** The verification confirms that `EditorPossibleValuesBasedDefaultValueDeterminer` is the only place where default values for `SpelTemplateParameterEditor` need to be handled. The other occurrences are: - In the API documentation (nu-designer-openapi.yaml) where it's just listed as one of the available editor types - In the migration guide (MigrationGuide.md) documenting a runtime behavior change, unrelated to default values

🏁 Scripts executed

The following scripts were executed for the analysis: Script: ```shell #!/bin/bash # Search for other potential places where SpelTemplateParameterEditor is used # to ensure we haven't missed any default value handling rg -l "SpelTemplateParameterEditor" | \ xargs rg -l "default.*value|defaultValue|determineDefault" ``` Length of output: 316 --- Script: ```shell #!/bin/bash # Let's check the content of these files to understand the context of SpelTemplateParameterEditor usage # and default value handling echo "=== Checking MigrationGuide.md ===" rg -A 5 -B 5 "SpelTemplateParameterEditor" docs/MigrationGuide.md echo -e "\n=== Checking nu-designer-openapi.yaml ===" rg -A 5 -B 5 "SpelTemplateParameterEditor" docs-internal/api/nu-designer-openapi.yaml echo -e "\n=== Checking the implementation file ===" cat scenario-compiler/src/main/scala/pl/touk/nussknacker/engine/definition/component/parameter/defaults/EditorPossibleValuesBasedDefaultValueDeterminer.scala ``` Length of output: 4611

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[github-actions[bot]]

created: #7201 :warning: Be careful! Snapshot changes are not necessarily the cause of the error. Check the logs.