Trait DrizzleSQLiteColumn 

pub trait DrizzleSQLiteColumn: Sized {
    type SQLType: SQLiteAffinity;

    const SQL_TYPE: &'static str = <Self::SQLType as SQLiteAffinity>::SQL_TYPE;

    // Required methods
    fn decode(value: SQLiteValueRef<'_>) -> Result<Self, DrizzleError>;
    fn encode(&self) -> SQLiteValue<'_>;

    // Provided method
    fn encode_owned(self) -> OwnedSQLiteValue { ... }
}

Trait for custom Rust types that map to a SQLite column.

Generated by #[derive(SQLiteEnum)]. Implement this trait manually for custom wrappers that should be usable directly in table schemas.

Associated Types

• SQLType: The Drizzle SQL type marker used for typed expressions and, through SQLiteAffinity, DDL/schema affinity metadata.

Required Methods

• decode: Convert a borrowed SQLite value read from the database into Self
• encode: Convert self to a SQLiteValue for insertion/updates

The blanket From<Self> for SQLiteValue owns the encoded value because insert/update models may store SQL fragments after the source value is dropped. Call encode() directly when you need an immediate borrowed value. Override encode_owned() when consuming self can avoid cloning owned data.

Provided Associated Constants

const SQL_TYPE: &'static str = <Self::SQLType as SQLiteAffinity>::SQL_TYPE

SQLite affinity spelling retained for source compatibility with custom column implementations.

Schema generation uses SQLType and SQLiteAffinity as the authority, so overriding this constant does not change the generated column type.

Required Associated Types

type SQLType: SQLiteAffinity

Drizzle SQL type marker for this column.

Use one of the built-in SQLite markers, such as Text, Integer, Blob, Real, Numeric, or Any.

Required Methods

fn decode(value: SQLiteValueRef<'_>) -> Result<Self, DrizzleError>

Decode a borrowed SQLite value read from the database into Self.

Implementations should reject unsupported storage classes with DrizzleError::ConversionError.

Errors

Returns DrizzleError::ConversionError if value cannot be decoded as this custom column type.

fn encode(&self) -> SQLiteValue<'_>

Convert self to a SQLiteValue for insertion/updates.

Provided Methods

fn encode_owned(self) -> OwnedSQLiteValue

Convert self to an owned SQLite value for stored bind parameters.

The default implementation owns the borrowed result of encode. Override this for wrappers that can move an internal string or byte buffer directly into the SQL parameter.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors