Struct EntityIdExtractor 

pub struct EntityIdExtractor;

Entity ID extractor for finding entity IDs in various contexts

Provides utilities for extracting entity IDs from field names, request paths, query parameters, and request bodies.

Implementations

impl EntityIdExtractor

pub fn from_field_name(field_name: &str) -> Option<String>

Extract entity ID from a field name

Looks for common patterns like “user_id”, “device_id”, “transaction_id”, etc. Returns the field name if it matches a pattern, or None if no pattern matches.

pub fn from_path(path: &str) -> Option<(String, EntityType)>

Extract entity ID and type from a request path

Looks for path parameters like “/users/{user_id}” or “/devices/{device_id}”. Returns a tuple of (entity_id, entity_type) if found in the path.

pub fn from_path_id_only(path: &str) -> Option<String>

Extract entity ID from a request path (backward compatibility)

Returns just the entity ID without type information.

pub fn from_json_value(value: &Value) -> Option<String>

Extract entity ID from a JSON value (request body or response)

Looks for common ID fields in the JSON object.

pub fn from_multiple_sources( field_name: Option<&str>, path: Option<&str>, json_value: Option<&Value>, ) -> Option<String>

Extract entity ID from multiple sources (field name, path, JSON)

Tries each source in order and returns the first match.