How To Fix /UI5/JSON_SCHEMA_CHK002 - Invalid number of properties: &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI5/JSON_SCHEMA_CHK -

• Message number: 002

• Message text: Invalid number of properties: &1.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI5/JSON_SCHEMA_CHK002 - Invalid number of properties: &1. ?

  The SAP error message /UI5/JSON_SCHEMA_CHK002 Invalid number of properties: &1 typically occurs in the context of SAPUI5 applications when there is an issue with the JSON schema validation of a model. This error indicates that the number of properties defined in the JSON object does not match the expected number defined in the schema.
  Cause:
  
  
  Schema Mismatch: The JSON object being validated has a different number of properties than what is defined in the JSON schema. This could be due to:
  
  Missing properties that are required.
  Extra properties that are not defined in the schema.
  Incorrectly defined properties in the JSON object.
  
  
  
  Data Structure Changes: If the data structure has changed (e.g., new fields added or existing fields removed) but the schema has not been updated accordingly, this error can occur.
  
  
  Incorrect JSON Format: The JSON data might not be formatted correctly, leading to validation issues.
  
  
  Solution:
  
  
  Review the JSON Schema: Check the JSON schema definition to ensure it accurately reflects the expected structure of the JSON data. Make sure that the number of properties defined in the schema matches the JSON object.
  
  
  Validate JSON Data: Use a JSON validator to check the structure of your JSON data. Ensure that it adheres to the schema and contains all required properties.
  
  
  Update the Schema: If the JSON data structure has changed, update the JSON schema to reflect the new structure. Ensure that all required properties are included and that any optional properties are correctly defined.
  
  
  Debugging: If you are unsure about the properties being sent, you can log the JSON data before it is validated to see what is being passed and compare it against the schema.
  
  
  Check for Typos: Ensure that there are no typos in property names, as this can lead to mismatches between the JSON data and the schema.
  
  
  Related Information:
  
  SAPUI5 Documentation: Refer to the official SAPUI5 documentation for guidelines on JSON schema validation and best practices for defining models.
  JSON Schema Specification: Familiarize yourself with the JSON Schema specification to understand how to define schemas correctly.
  Debugging Tools: Use browser developer tools to inspect the network requests and responses to see the JSON data being sent and received.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.