Refactor UUID schema

src/backend/mysql/table.rs

@@ -81,8 +81,8 @@ impl TableBuilder for MysqlQueryBuilder {
                 },
                 ColumnType::Json => "json".into(),
                 ColumnType::JsonBinary => "json".into(),
+                ColumnType::Uuid => "binary(16)".into(),
                 ColumnType::Custom(iden) => iden.to_string(),
-                ColumnType::Uuid => format!("binary(16)"),
             }
         )
         .unwrap()

src/backend/postgres/table.rs

@@ -81,8 +81,8 @@ impl TableBuilder for PostgresQueryBuilder {
                 },
                 ColumnType::Json => "json".into(),
                 ColumnType::JsonBinary => "jsonb".into(),
-                ColumnType::Custom(iden) => iden.to_string(),
                 ColumnType::Uuid => "uuid".into(),
+                ColumnType::Custom(iden) => iden.to_string(),
             }
         )
         .unwrap()

src/backend/sqlite/table.rs

@@ -101,8 +101,8 @@ impl TableBuilder for SqliteQueryBuilder {
                 },
                 ColumnType::Json => "text".into(),
                 ColumnType::JsonBinary => "text".into(),
-                ColumnType::Custom(iden) => iden.to_string(),
                 ColumnType::Uuid => "text(36)".into(),
+                ColumnType::Custom(iden) => iden.to_string(),
             }
         )
         .unwrap()

src/table/column.rs

@@ -31,8 +31,8 @@ pub enum ColumnType {
     Money(Option<(u32, u32)>),
     Json,
     JsonBinary,
-    Custom(DynIden),
     Uuid,
+    Custom(DynIden),
 }
 
 /// All column specification keywords
@@ -281,21 +281,27 @@ impl ColumnDef {
     }
 
     /// Set column type as json.
-    /// On MySQL, this is equivalent to json_binary. On MariaDB, this is equivalent to text.
-    /// On PgSQL, this is equivalent to json.
+    /// On MySQL, this is equivalent to `json_binary`. On MariaDB, this is equivalent to `text`.
+    /// On PgSQL, this is equivalent to `json`.
     pub fn json(mut self) -> Self {
         self.types = Some(ColumnType::Json);
         self
     }
 
     /// Set column type as json binary.
-    /// On MySQL, this is equivalent to json. On MariaDB, this is equivalent to text.
-    /// On PgSQL, this is equivalent to jsonb.
+    /// On MySQL, this is equivalent to `json`. On MariaDB, this is equivalent to `text`.
+    /// On PgSQL, this is equivalent to `jsonb`.
     pub fn json_binary(mut self) -> Self {
         self.types = Some(ColumnType::JsonBinary);
         self
     }
 
+    /// Set column type as uuid
+    pub fn uuid(mut self) -> Self {
+        self.types = Some(ColumnType::Uuid);
+        self
+    }
+
     /// Use a custom type on this column.
     pub fn custom<T: 'static>(mut self, n: T) -> Self
     where
@@ -322,10 +328,4 @@ impl ColumnDef {
     pub fn get_column_spec(&self) -> &Vec<ColumnSpec> {
         self.spec.as_ref()
     }
-
-    /// Set column type as uuid
-    pub fn uuid(mut self) -> Self {
-        self.types = Some(ColumnType::Uuid);
-        self
-    }
 }