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*FlutterFlow usually warns you, but double-check!*
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- Avoid using the same name for the action and any argument.
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### Return Type Mismatch
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- Ensure the custom action returns the correct data type as defined in the settings.
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- **Reserved Keywords**
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*The function should return the type specified in the settings panel.*
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- Do not use Dart/Flutter reserved keywords as argument names. **Examples:** `abstract`, `else`, `import`, `show`, `as`, `enum`, `in`, `static`, `this`.
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*FlutterFlow usually warns you, but double-check!*
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### Internal Library Imports
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- If importing internal libraries (e.g., `../../flutterflow`), set **Exclude from compilation** to `true` if needed.
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- **Return Type Mismatch**
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### Pubspec Dependencies
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- Are all required dependencies included in both the code and the PubSpec?
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- Ensure the custom action returns the correct data type as defined in the settings.
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- Check for:
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- Version conflicts (check on [pub.dev](https://pub.dev))
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- Multiple versions of the same dependency
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- Conflicts with FlutterFlow's auto-imported dependencies
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*The function should return the type specified in the settings panel.*
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- **Internal Library Imports**
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- If importing internal libraries (e.g., `../../flutterflow`), set **Exclude from compilation** to `true` if needed.
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### Code Errors
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-**Null values:**
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- **Pubspec Dependencies**
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```dart
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int example = passingIntWhichMayBeNullable ?? 0;
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```
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- **Correct data types:**
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- Are all required dependencies included in both the code and the PubSpec?
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```dart
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String numberAsString = "5";
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int example = thisWord; // ❌ Passing a string to an int
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```
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Use `.toString()`, `.toInt()`, `.toDouble()` as needed.
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- **Single elements** vs **arrays:**
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- Ensure you are not passing a single element where a list is expected, or vice versa.
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Check for:
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- Version conflicts (check on **[pub.dev](https://pub.dev)**)
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- Multiple versions of the same dependency
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- Conflicts with FlutterFlow's auto-imported dependencies
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### Exclude from Compilation
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If this is checked, code will not be error-checked during compilation, but will still run in Test/Run Mode.
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### Duplicate Data Types/Structs
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- Do not redefine data types or structs already defined in FlutterFlow's data schema panel.
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- **Code Errors**
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- **Null values:**
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### Callback Data Types
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- Ensure callback actions return the correct data type.
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```js
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int example = passingIntWhichMayBeNullable ?? 0;
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```
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- **Correct data types:**
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```js
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String numberAsString = "5";
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int example = thisWord; // ❌ Passing a string to an int
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```
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Use `.toString()`, `.toInt()`, `.toDouble()` as needed.
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- **Single elements** vs **arrays:**
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- Ensure you are not passing a single element where a list is expected, or vice versa.
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## 3. Additional Resources
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- **Exclude from Compilation**
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If this is checked, the code will not be error-checked during compilation, but will still run in Test/Run Mode.
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- **Duplicate Data Types/Structs**
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- Do not redefine data types or structs already defined in FlutterFlow's data schema panel.
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- **Callback Data Types**
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- Ensure callback actions return the correct data type.
Sometimes, the compiler does not show any errors in the custom action, but the custom action still won't work as expected. This might be due to the code logic or the implementation. In order to test the implementation and the flow, you can use the debug console to test the custom action in different scenarios.
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## Steps for Implementation:
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**Steps for Implementation**:
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The core function that you can use to test the custom actions on the console is the **debugPrint** function in Flutter. To use that in the custom actions, follow these steps:
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### Step 1
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-**Step 1**
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Use debugPrint to print some error on the debug console in case of a specific result. You can use if-else statements or try-catch statements in order to test the success of the scenario:
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Use debugPrint to print some error on the debug console in case of a specific result. You can use if-else statements or try-catch statements in order to test the success of the scenario:
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### Step 2
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-**Step 2**
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After the correct implementation in the code, use the action inside the app. On the run mode, open the console. Now you should be able to see the errors in the console upon performing the action.
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After the correct implementation in the code, use the action inside the app. On the run mode, open the console. Now you should be able to see the errors in the console upon performing the action.
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## Still having issues?
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If you are still running into issues in your implementation after following the outlined steps, please contact support via chat in-app or email at [email protected].
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:::info[Still having issues?]
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If you are still running into issues in your implementation after following the outlined steps, please contact support at [email protected].
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