| 340 | } |
| 341 | |
| 342 | fn extract_key<Model>(target_col: &Identity, model: &Model) -> Result<ValueTuple, DbErr> |
| 343 | where |
| 344 | Model: ModelTrait, |
| 345 | { |
| 346 | Ok(match target_col { |
| 347 | Identity::Unary(a) => { |
| 348 | let a = a.to_string(); |
| 349 | let column_a = |
| 350 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str(&a) |
| 351 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{a}' to column A:1")))?; |
| 352 | ValueTuple::One(model.get(column_a)) |
| 353 | } |
| 354 | Identity::Binary(a, b) => { |
| 355 | let a = a.to_string(); |
| 356 | let b = b.to_string(); |
| 357 | let column_a = |
| 358 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str(&a) |
| 359 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{a}' to column A:2")))?; |
| 360 | let column_b = |
| 361 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str(&b) |
| 362 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{b}' to column B:2")))?; |
| 363 | ValueTuple::Two(model.get(column_a), model.get(column_b)) |
| 364 | } |
| 365 | Identity::Ternary(a, b, c) => { |
| 366 | let a = a.to_string(); |
| 367 | let b = b.to_string(); |
| 368 | let c = c.to_string(); |
| 369 | let column_a = |
| 370 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str( |
| 371 | &a.to_string(), |
| 372 | ) |
| 373 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{a}' to column A:3")))?; |
| 374 | let column_b = |
| 375 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str( |
| 376 | &b.to_string(), |
| 377 | ) |
| 378 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{b}' to column B:3")))?; |
| 379 | let column_c = |
| 380 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str( |
| 381 | &c.to_string(), |
| 382 | ) |
| 383 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{c}' to column C:3")))?; |
| 384 | ValueTuple::Three( |
| 385 | model.get(column_a), |
| 386 | model.get(column_b), |
| 387 | model.get(column_c), |
| 388 | ) |
| 389 | } |
| 390 | Identity::Many(cols) => { |
| 391 | let mut values = Vec::new(); |
| 392 | for col in cols { |
| 393 | let col_name = col.to_string(); |
| 394 | let column = |
| 395 | <<<Model as ModelTrait>::Entity as EntityTrait>::Column as FromStr>::from_str( |
| 396 | &col_name, |
| 397 | ) |
| 398 | .map_err(|_| DbErr::Type(format!("Failed at mapping '{col_name}' to colum")))?; |
| 399 | values.push(model.get(column)) |