Schema Validation

This guide shows you how to validate document structure using Joyfill’s schema validation system.

What is Schema Validation

Schema validation checks if your JSON document follows the correct Joyfill document structure before creating a form.

Enabling/Disabling Schema Validation

Schema validation is enabled by default in rememberDocumentEditor:

// Disable schema validation
val editor = rememberDocumentEditor(
    json = jsonString,
    validateSchema = false // default is true
)

How It Works

When validateSchema = true:

Document is validated against the Joyfill schema during editor creation
If validation fails, an error is set and the onError callback is triggered
If validation passes, the editor is created normally

Schema Error Types

Error Type	Code	When It Happens	Example
SchemaError.Assertion	ERROR_SCHEMA_VALIDATION	Document structure doesn’t match schema rules	Missing required properties like files or fields
SchemaError.Format	ERROR_SCHEMA_FORMAT	JSON format is invalid	Empty/blank string or malformed JSON
SchemaError.Version	ERROR_SCHEMA_VERSION	Document version incompatible with SDK	Document created with newer SDK version

Error Monitoring

Monitor schema errors reactively:

@Composable
fun FormWithSchemaValidation() {
    val editor = rememberDocumentEditor(json = jsonString)
    val error = editor.error.watchAsState()
    
    if (error != null) {
        // Schema validation failed
        Text("Schema Error: ${error.message}")
    } else {
        // Schema is valid, show form
        Form(editor = editor)
    }
}

Things to know

Schema validation is enabled by default (validateSchema = true). Disabling schema validation can lead to crashes and should only be used for testing. Schema errors include both user-friendly messages and technical details. Validation happens during editor creation, not during form interaction.

Getting Started

Guides

API Reference

Resources

What is Schema Validation

Enabling/Disabling Schema Validation

How It Works

Schema Error Types

Error Monitoring

Things to know

​What is Schema Validation

​Enabling/Disabling Schema Validation

​How It Works

​Schema Error Types

​Error Monitoring

​Things to know

What is Schema Validation

Enabling/Disabling Schema Validation

How It Works

Schema Error Types

Error Monitoring

Things to know