Struct StringHandler 

pub struct StringHandler;

String validation handler

Validates string fields according to the following rules:

• Must not be empty (required for all string fields)
• Must not exceed maximum length if specified
• Returns the original string if valid (no canonicalization needed)

Implementations

impl StringHandler

pub fn validate_and_canonicalize( value: &str, max_length: Option<usize>, field_name: &str, ) -> Result<String>

Validate and canonicalize a string value

Arguments

• value - The string value to validate
• max_length - Optional maximum length constraint
• field_name - Name of the field (for error messages)

Returns

• Ok(String) - The validated string (unchanged)
• Err(anyhow::Error) - Validation failed with detailed error