How To Fix /UI5/JSON_SCHEMA_CHK004 - Array item type error: Prop &1 Exp: &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI5/JSON_SCHEMA_CHK -

• Message number: 004

• Message text: Array item type error: Prop &1 Exp: &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI5/JSON_SCHEMA_CHK004 - Array item type error: Prop &1 Exp: &2 ?

  The SAP error message /UI5/JSON_SCHEMA_CHK004 Array item type error: Prop &1 Exp: &2 typically occurs in the context of SAPUI5 applications when there is a mismatch between the expected data type of an array item and the actual data type being provided. This error is related to JSON schema validation, where the framework checks if the data structure adheres to the defined schema.
  Cause:
  
  Data Type Mismatch: The error indicates that an array item in your JSON data does not match the expected type defined in the schema. For example, if the schema expects an integer but receives a string, this error will be triggered.
  Incorrect JSON Structure: The JSON data being passed may not conform to the expected structure, leading to validation errors.
  Schema Definition Issues: There may be issues in the schema definition itself, such as incorrect type definitions or missing properties.
  
  Solution:
  
  
  Check the JSON Data: Review the JSON data being passed to ensure that all array items conform to the expected types as defined in the schema. For example, if the schema expects an integer, ensure that the data being passed is indeed an integer and not a string or another type.
  
  
  Validate the Schema: Ensure that the JSON schema is correctly defined. Check for:
  
  Correct data types (e.g., string, integer, boolean, etc.)
  Required properties and their types
  Proper structure of arrays and objects
  
  
  
  Debugging: Use debugging tools or console logs to inspect the data being passed to the UI5 component. This can help identify where the mismatch is occurring.
  
  
  Update the Application Code: If the data is being transformed or manipulated in the application, ensure that the transformations maintain the correct data types.
  
  
  Testing: After making changes, test the application thoroughly to ensure that the error is resolved and that the application behaves as expected.
  
  
  Related Information:
  
  SAPUI5 Documentation: Refer to the official SAPUI5 documentation for guidelines on JSON schema validation and data binding.
  JSON Schema Specification: Familiarize yourself with JSON Schema specifications to understand how to define schemas correctly.
  Debugging Tools: Utilize browser developer tools to inspect network requests and responses, which can help in identifying issues with the data being sent to the UI5 application.
  
  By following these steps, you should be able to identify and resolve the /UI5/JSON_SCHEMA_CHK004 error in your SAPUI5 application.