Struct DatabaseManager 

pub struct DatabaseManager { /* private fields */ }

DatabaseManager provides a centralized way to manage multiple models and their storage

Implementations

impl DatabaseManager

pub fn new() -> Self

Create a new DatabaseManager

pub fn register_model( &self, model_name: &str, primary_memory_id: Option<u8>, secondary_memory_id: Option<u8>, ) -> Result<(), String>

Register a model with the database manager

Arguments

• model_name - Unique name for the model
• primary_memory_id - Memory ID for primary storage (None for auto-allocation)
• secondary_memory_id - Memory ID for secondary index (None for no secondary index)

Returns

• Result<(), String> - Ok if registration successful, Err with message if failed

pub fn get_database<T, SecondaryKey>( &self, model_name: &str, get_secondary_key: Option<Box<dyn Fn(&T) -> Option<SecondaryKey>>>, ) -> Result<Database<T, SecondaryKey>, String>

where T: CandidType + Serialize + for<'de> Deserialize<'de> + Clone, SecondaryKey: Storable + Ord + Clone,

Create a database instance for a registered model

pub fn get_simple_database<T>( &self, model_name: &str, ) -> Result<Database<T>, String>

where T: CandidType + Serialize + for<'de> Deserialize<'de> + Clone,

Create a database instance without secondary index

pub fn insert<T>( &self, model_name: &str, key: &str, data: &T, ) -> Result<Document<T>, String>

where T: CandidType + Serialize + for<'de> Deserialize<'de> + Clone,

Insert data into a registered model’s database

pub fn get<T>(&self, model_name: &str, key: &str) -> Result<T, String>

where T: CandidType + Serialize + for<'de> Deserialize<'de> + Clone,

Get data from a registered model’s database

pub fn query<T>( &self, model_name: &str, page_size: usize, page_number: usize, ) -> Result<QueryResponse<T>, String>

where T: CandidType + Serialize + for<'de> Deserialize<'de> + Clone,

Query data from a registered model’s database

pub fn list_models(&self) -> Vec<String>

List all registered models

pub fn is_model_registered(&self, model_name: &str) -> bool

Check if a model is registered

pub fn get_model_info( &self, model_name: &str, ) -> Option<(MemoryId, Option<MemoryId>)>

Get model information

pub fn reserve_memory_range( &self, start: u8, end: u8, description: &str, ) -> Result<(), String>

Reserve memory IDs for a range (useful for ATP which uses 0-9)

Trait Implementations

impl Default for DatabaseManager

fn default() -> Self

Returns the “default value” for a type.