sea-orm-cli 1.0 generate entity from mysql generates String for MediumBlob fields

I defined a mediumblob field using this code:

ColumnDef::new(MyTable::SharingPhoto).custom(MySqlType::MediumBlob)

When I generate an entity file using the command

sea-orm-cli generate entity --with-serde=both -l -o ./entity/src/

the type of the field in the generated entity file becomes a String type：

pub struct Model {
    #[sea_orm(column_type = "custom(\"mediumblob\")")]
    pub sharing_photo: Option<String>,
}

Under such circumstances, if I query data from the database, this error occurs:

error=Query Error: error occurred while decoding column "sharing_photo": mismatched types; Rust type `core::option::Option<alloc::string::String>` (as SQL type `VARCHAR`) is not compatible with SQL type `BLOB`

Start by reproducing the issue with the shown sea-orm-cli generate entity command and inspect the generated entity file for the MediumBlob column. Trace the generator's MySQL type mapping, then verify the generated field uses a blob-compatible Rust type and that querying the column no longer produces the reported decoding mismatch.