SeaORM 0.12.x Docs - 1 (#99)

* Optional Field SeaQL/sea-orm#1513

* .gitignore SeaQL/sea-orm#1334

* migration table custom name SeaQL/sea-orm#1511

* OR condition relation SeaQL/sea-orm#1433

* DerivePartialModel SeaQL/sea-orm#1597

* space for migration file naming SeaQL/sea-orm#1570

* composite key up to 12 SeaQL/sea-orm#1508

* seaography integration SeaQL/sea-orm#1599

* QuerySelect SimpleExpr SeaQL/sea-orm#1702

* sqlErr SeaQL/sea-orm#1707

* migration check SeaQL/sea-orm#1519

* postgres array SeaQL/sea-orm#1565

* param intoString SeaQL/sea-orm#1439

* **skipped** re-export SeaQL/sea-orm#1661

* ping SeaQL/sea-orm#1627

* on empty do nothing SeaQL/sea-orm#1708

* on conflict do nothing SeaQL/sea-orm#1712

* **skipped** upgrade versions

* active enum fail safe SeaQL/sea-orm#1374

* relation generation check SeaQL/sea-orm#1435

* entity generation bug SeaQL/sea-schema#105

* **skipped** bug fix that does not require edits

* EnumIter change SeaQL/sea-orm#1535

* completed and fixed a previous todo SeaQL/sea-orm#1570

* amended wordings and structures

* Edit

* Remove temp file

---------

Co-authored-by: Billy Chan <ccw.billy.123@gmail.com>

SeaORM/docs/02-install-and-config/01-database-and-async-runtime.md

@@ -52,5 +52,5 @@ Basically, they are in the form of `runtime-ASYNC_RUNTIME-TLS_LIB`:
 + `with-rust_decimal` - support [`rust_decimal`](https://crates.io/crates/rust_decimal) types
 + `with-bigdecimal` - support [`bigdecimal`](https://crates.io/crates/bigdecimal) types
 + `with-uuid` - support [`uuid`](https://crates.io/crates/uuid) types
-+ `postgres-array` - support array types in Postgres
++ `postgres-array` - support array types in Postgres (automatically enabled when `sqlx-postgres` feature is turned on)
 + `sea-orm-internal` - opt-in unstable internal APIs (for accessing re-export SQLx types)

SeaORM/docs/02-install-and-config/02-connection.md

@@ -21,7 +21,7 @@ Multiple queries will execute in parallel as you `await` on them.
 To configure the connection, use the [`ConnectOptions`](https://docs.rs/sea-orm/*/sea_orm/struct.ConnectOptions.html) interface:
 
 ```rust
-let mut opt = ConnectOptions::new("protocol://username:password@host/database".to_owned());
+let mut opt = ConnectOptions::new("protocol://username:password@host/database");
 opt.max_connections(100)
     .min_connections(5)
     .connect_timeout(Duration::from_secs(8))
@@ -30,11 +30,23 @@ opt.max_connections(100)
     .max_lifetime(Duration::from_secs(8))
     .sqlx_logging(true)
     .sqlx_logging_level(log::LevelFilter::Info)
-    .set_schema_search_path("my_schema".into()); // Setting default PostgreSQL schema
+    .set_schema_search_path("my_schema"); // Setting default PostgreSQL schema
 
 let db = Database::connect(opt).await?;
 ```
 
+## Checking Connection is Valid
+
+Checks if a connection to the database is still valid.
+
+```rust
+|db: DatabaseConnection| {
+    assert!(db.ping().await.is_ok());
+    db.clone().close().await;
+    assert!(matches!(db.ping().await, Err(DbErr::ConnectionAcquire)));
+}
+```
+
 ## Closing Connection
 
 The connection will be automatically closed on drop. To close the connection explicitly, call the `close` method.

SeaORM/docs/03-migration/01-setting-up-migration.md

@@ -6,7 +6,26 @@ If you are starting from a fresh database, it's better to version control your d
 
 ## Migration Table
 
-A table named `seaql_migrations` will be created in your database to keep track of the applied migrations. It will be created automatically when you run the migration.
+A table will be created in your database to keep track of the applied migrations. It will be created automatically when you run the migration.
+
+By default, it will be named `seaql_migrations`. You can also use a custom name for your migration table.
+
+```rust
+#[async_trait::async_trait]
+impl MigratorTrait for Migrator {
+    fn migrations() -> Vec<Box<dyn MigrationTrait>> {
+        vec![
+            Box::new(m20220118_000001_create_cake_table::Migration),
+            Box::new(m20220118_000002_create_fruit_table::Migration),
+        ]
+    }
+
+    // Override the name of migration table
+    fn migration_table_name() -> sea_orm::DynIden {
+        Alias::new("override_migration_table_name").into_iden()
+    }
+}
+```  
 
 ## Creating Migration Directory
 
@@ -45,6 +64,8 @@ migration
     └── main.rs                             # Migrator CLI, for running manually
 ```
 
+Note that if you setup the migration directory directly within a Git repository, a `.gitignore` file will also be created.
+
 ## Workspace Structure
 
 It is recommended to structure your cargo workspace as follows to share SeaORM entities between the app crate and the migration crate. Checkout the [integration examples](https://github.com/SeaQL/sea-orm/tree/master/examples) for demonstration.

SeaORM/docs/03-migration/02-writing-migration.md

@@ -6,11 +6,16 @@ Each migration contains two methods: `up` and `down`. The `up` method is used to
 
 Generate a new migration file by executing `sea-orm-cli migrate generate` command.
 
+If you name the file with spaces, it will be converted according to the convention automatically. 
+
 ```shell
 sea-orm-cli migrate generate NAME_OF_MIGRATION [--local-time]
 
 # E.g. to generate `migration/src/m20220101_000001_create_table.rs` shown below
 sea-orm-cli migrate generate create_table
+
+# This create the same migration file as above command
+sea-orm-cli migrate generate "create table"
 ```
 
 Or you can create a migration file using the template below. Name the file according to the naming convention `mYYYYMMDD_HHMMSS_migration_name.rs`.

SeaORM/docs/03-migration/03-running-migration.md

@@ -84,11 +84,24 @@ For CLI, you can specify the target schema with `-s` / `--database_schema` optio
 You can also run the migration on the target schema programmatically:
 
 ```rust
-let connect_options = ConnectOptions::new("postgres://root:root@localhost/database".into())
-    .set_schema_search_path("my_schema".into()) // Override the default schema
+let connect_options = ConnectOptions::new("postgres://root:root@localhost/database")
+    .set_schema_search_path("my_schema") // Override the default schema
     .to_owned();
 
 let db = Database::connect(connect_options).await?
 
 migration::Migrator::up(&db, None).await?;
 ```
+
+## Checking Migration Status
+
+You can use `Migration::name()` and `Migration::status()` to get the name and status of a `sea_orm_migration::Migration`
+
+```rust
+let migrations = Migrator::get_pending_migrations(db).await?;
+assert_eq!(migrations.len(), 5);
+
+let migration = migrations.get(0).unwrap();
+assert_eq!(migration.name(), "m20220118_000002_create_fruit_table");
+assert_eq!(migration.status(), MigrationStatus::Pending);
+```

SeaORM/docs/04-generate-entity/01-sea-orm-cli.md

@@ -57,6 +57,7 @@ Command line options:
 - `--max-connections`: maximum number of database connections to be initialized in the connection pool (default: `1`)
 - `--model-extra-derives`: append extra derive macros to the generated model struct
 - `--model-extra-attributes`: append extra attributes to generated model struct
+- `--seaography`: an additional RelatedEntity enum for seaography integration will be generated.
 
 ```shell
 # Generate entity files of database `bakery` to `entity/src`

SeaORM/docs/04-generate-entity/02-entity-structure.md

@@ -199,6 +199,8 @@ pub id: i32
 
 This is usually the case in junction tables, where a two-column tuple is used as the primary key. Simply annotate multiple columns to define a composite primary key. By default, `auto_increment` is `false` for composite key.
 
+You can define up to 12 primary key in a model.
+
 ```rust
 pub struct Model {
     #[sea_orm(primary_key)]

SeaORM/docs/05-basic-crud/03-insert.md

@@ -187,6 +187,18 @@ let res: InsertResult = Fruit::insert_many([apple, orange]).exec(db).await?;
 assert_eq!(res.last_insert_id, 30)
 ```
 
+Supplying an empty iterator to `insert_many` method will yield an error. However, you can change the behaviour with `on_empty_do_nothing` method to handle inserting an empty iterator properly.
+
+```rust
+// now, you can do:
+let res = Bakery::insert_many(std::iter::empty())
+    .on_empty_do_nothing()
+    .exec(db)
+    .await;
+
+assert!(matches!(res, Ok(TryInsertResult::Empty)));
+```
+
 ## On Conflict
 
 Insert active model with on conflict behaviour.
@@ -269,3 +281,17 @@ let res = Entity::insert_many([
 
 assert_eq!(res.err(), Some(DbErr::RecordNotInserted));
 ```
+
+Or you can use `.do_nothing()` to handle insert with conflict properly.
+
+```rust
+let on = OnConflict::column(Column::Id).do_nothing().to_owned();
+
+// Existing behaviour
+let res = Entity::insert_many([..]).on_conflict(on).exec(db).await;
+assert!(matches!(res, Err(DbErr::RecordNotInserted)));
+
+// you can also:
+let res = Entity::insert_many([..]).on_conflict(on).do_nothing().exec(db).await;
+assert!(matches!(res, Ok(TryInsertResult::Conflicted)));
+```

SeaORM/docs/05-basic-crud/08-raw-sql.md

@@ -88,7 +88,7 @@ You can build SQL statements using `sea-query` and query / execute it directly o
 let query_res: Option<QueryResult> = db
     .query_one(Statement::from_string(
         DatabaseBackend::MySql,
-        "SELECT * FROM `cake`;".to_owned(),
+        "SELECT * FROM `cake`;",
     ))
     .await?;
 let query_res = query_res.unwrap();
@@ -97,7 +97,7 @@ let id: i32 = query_res.try_get("", "id")?;
 let query_res_vec: Vec<QueryResult> = db
     .query_all(Statement::from_string(
         DatabaseBackend::MySql,
-        "SELECT * FROM `cake`;".to_owned(),
+        "SELECT * FROM `cake`;",
     ))
     .await?;
 ```
@@ -108,7 +108,7 @@ let query_res_vec: Vec<QueryResult> = db
 let exec_res: ExecResult = db
     .execute(Statement::from_string(
         DatabaseBackend::MySql,
-        "DROP DATABASE IF EXISTS `sea`;".to_owned(),
+        "DROP DATABASE IF EXISTS `sea`;",
     ))
     .await?;
 assert_eq!(exec_res.rows_affected(), 1);

SeaORM/docs/06-relation/03-many-to-many.md

@@ -89,3 +89,44 @@ pub enum Relation {
     Filling,
 }
 ```
+
+Note that the implementation of `Related<R>` with `via` and `to` methods will not be generated if there exists multiple paths via an intermediate table. 
+
+For example, in the schema defined below, there are two paths:
+- Path 1. `users <-> users_votes <-> bills`
+- Path 2. `users <-> users_saved_bills <-> bills`
+
+Therefore, the implementation of `Related<R>` will not be generated
+
+```sql
+CREATE TABLE users
+(
+  id uuid  PRIMARY KEY  DEFAULT uuid_generate_v1mc(),
+  email TEXT UNIQUE NOT NULL,
+  ...
+);
+```
+```sql
+CREATE TABLE bills
+(
+  id uuid  PRIMARY KEY  DEFAULT uuid_generate_v1mc(),
+  ...
+);
+```
+```sql
+CREATE TABLE users_votes
+(
+  user_id uuid REFERENCES users (id) ON UPDATE CASCADE ON DELETE CASCADE,
+  bill_id uuid REFERENCES bills (id) ON UPDATE CASCADE ON DELETE CASCADE,
+  vote boolean NOT NULL,
+  CONSTRAINT users_bills_pkey PRIMARY KEY (user_id, bill_id)
+);
+```
+```sql
+CREATE TABLE users_saved_bills
+(
+  user_id uuid REFERENCES users (id) ON UPDATE CASCADE ON DELETE CASCADE,
+  bill_id uuid REFERENCES bills (id) ON UPDATE CASCADE ON DELETE CASCADE,
+  CONSTRAINT users_saved_bills_pkey PRIMARY KEY (user_id, bill_id)
+);
+```

SeaORM/docs/06-relation/06-custom-join-condition.md

@@ -18,6 +18,8 @@ It can be done via one of the following ways.
 
 Add your additional join conditions directly to the relation enum. The easiest way is to provide a `sea_query::SimpleExpr` via `on_condition` procedural macros attribute.
 
+If you want to have a `OR` condition relation, you can use `condition_type = "any"` to alter the relation.
+
 ```rust
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
 pub enum Relation {
@@ -29,6 +31,13 @@ pub enum Relation {
         on_condition = r#"super::fruit::Column::Name.like("%tropical%")"#
     )]
     TropicalFruit,
+    // specify `condition_type = "any"` to override it
+    #[sea_orm(
+        has_many = "super::fruit::Entity",
+        on_condition = r#"super::fruit::Column::Name.like("%tropical%")"#
+        condition_type = "any",
+    )]
+    OrTropicalFruit,
 }
 ```
 
@@ -126,7 +135,7 @@ assert_eq!(
 
 ## Custom Join
 
-Last but not least, custom join conditions can be defined at the point you construct the join expression.
+Last but not least, custom join conditions can be defined at the point you construct the join expression. Overriding condition relation can also be done in custom join on the fly.
 
 ```rust
 assert_eq!(
@@ -153,6 +162,19 @@ assert_eq!(
                         .into_condition()
                 })
         )
+        .join_as_rev(
+            JoinType::LeftJoin,
+            cake_filling::Relation::Cake
+                .def()
+                // chained AND / OR join on condition
+                .condition_type(ConditionType::Any)
+                .on_condition(|left, _right| {
+                    Expr::col((left, cake_filling::Column::CakeId))
+                        .gt(10)
+                        .into_condition()
+                }),
+            Alias::new("cake_filling_alias")
+        )
         .join(JoinType::LeftJoin, filling::Relation::Vendor.def())
         .build(DbBackend::MySql)
         .to_string(),
@@ -161,6 +183,7 @@ assert_eq!(
         "LEFT JOIN `fruit` ON `cake`.`id` = `fruit`.`cake_id` AND `fruit`.`name` LIKE '%tropical%'",
         "LEFT JOIN `cake_filling` ON `cake`.`id` = `cake_filling`.`cake_id` AND `cake_filling`.`cake_id` > 10",
         "LEFT JOIN `filling` ON `cake_filling`.`filling_id` = `filling`.`id` AND `filling`.`name` LIKE '%lemon%'",
+        "LEFT JOIN `cake_filling` AS `cake_filling_alias` ON `cake_filling_alias`.`cake_id` = `cake`.`id` OR `cake_filling_alias`.`cake_id` > 10",
         "LEFT JOIN `vendor` ON `filling`.`vendor_id` = `vendor`.`id`",
     ]
     .join(" ")

SeaORM/docs/08-advanced-query/01-custom-select.md

@@ -57,6 +57,33 @@ assert_eq!(
 );
 ```
 
+### Optional field
+
+Since 0.12, SeaORM supports for partial select of `Option<T>` model field. A `None` value will be filled when the select result does not contain the `Option<T>` field without throwing an error.
+
+```rust
+customer::ActiveModel {
+    name: Set("Alice".to_owned()),
+    notes: Set(Some("Want to communicate with Bob".to_owned())),
+    ..Default::default()
+}
+.save(db)
+.await?;
+
+// The `notes` field was intentionally leaved out
+let customer = Customer::find()
+    .select_only()
+    .column(customer::Column::Id)
+    .column(customer::Column::Name)
+    .one(db)
+    .await
+    .unwrap();
+
+// The select result does not contain `notes` field.
+// Since it's of type `Option<String>`, it'll be `None` and no error will be thrown.
+assert_eq!(customers.notes, None);
+```
+
 ## Select Custom Expressions
 
 Select any custom expression with `column_as` method, it takes any [`sea_query::SimpleExpr`](https://docs.rs/sea-query/*/sea_query/expr/enum.SimpleExpr.html) and an alias. Use [`sea_query::Expr`](https://docs.rs/sea-query/*/sea_query/expr/struct.Expr.html) helper to build `SimpleExpr`.
@@ -74,6 +101,45 @@ assert_eq!(
 );
 ```
 
+Alternatively, you can simply select with `expr`, `exprs` and `expr_as` methods.
+
+```rust
+use sea_orm::sea_query::Expr;
+use sea_orm::{entity::*, tests_cfg::cake, DbBackend, QuerySelect, QueryTrait};
+
+assert_eq!(
+    cake::Entity::find()
+        .select_only()
+        .expr(Expr::col((cake::Entity, cake::Column::Id)))
+        .build(DbBackend::MySql)
+        .to_string(),
+    "SELECT `cake`.`id` FROM `cake`"
+);
+
+assert_eq!(
+    cake::Entity::find()
+        .select_only()
+        .exprs([
+            Expr::col((cake::Entity, cake::Column::Id)),
+            Expr::col((cake::Entity, cake::Column::Name)),
+        ])
+        .build(DbBackend::MySql)
+        .to_string(),
+    "SELECT `cake`.`id`, `cake`.`name` FROM `cake`"
+);
+
+assert_eq!(
+    cake::Entity::find()
+        .expr_as(
+            Func::upper(Expr::col((cake::Entity, cake::Column::Name))),
+            "name_upper"
+        )
+        .build(DbBackend::MySql)
+        .to_string(),
+    "SELECT `cake`.`id`, `cake`.`name`, UPPER(`cake`.`name`) AS `name_upper` FROM `cake`"
+);
+```
+
 ## Handling Select Results
 
 ### Custom Struct