feat: add index inspect

aerich/__init__.py

@@ -108,7 +108,7 @@ class Command:
             ret.append(version)
         return ret
 
-    async def inspectdb(self, tables: List[str]) -> str:
+    async def inspectdb(self, tables: List[str] = None) -> str:
         connection = get_app_connection(self.tortoise_config, self.app)
         dialect = connection.schema_generator.DIALECT
         if dialect == "mysql":

aerich/inspect/__init__.py

@@ -12,17 +12,22 @@ class Column(BaseModel):
     comment: Optional[str]
     pk: bool
     unique: bool
+    index: bool
     length: Optional[int]
     extra: Optional[str]
     decimal_places: Optional[int]
     max_digits: Optional[int]
 
     def translate(self) -> dict:
-        comment = default = length = unique = null = pk = ""
+        comment = default = length = index = null = pk = ""
         if self.pk:
             pk = "pk=True, "
-        if self.unique:
+        else:
-            unique = "unique=True, "
+            if self.unique:
+                index = "unique=True, "
+            else:
+                if self.index:
+                    index = "index=True, "
         if self.data_type in ["varchar", "VARCHAR"]:
             length = f"max_length={self.length}, "
         if self.data_type == "decimal":
@@ -53,7 +58,7 @@ class Column(BaseModel):
         return {
             "name": self.name,
             "pk": pk,
-            "unique": unique,
+            "index": index,
             "null": null,
             "default": default,
             "length": length,
@@ -99,7 +104,7 @@ class Inspect:
 
     @classmethod
     def decimal_field(cls, **kwargs) -> str:
-        return "{name} = fields.DecimalField({pk}{unique}{length}{null}{default}{comment})".format(
+        return "{name} = fields.DecimalField({pk}{index}{length}{null}{default}{comment})".format(
             **kwargs
         )
 
@@ -125,21 +130,21 @@ class Inspect:
 
     @classmethod
     def char_field(cls, **kwargs) -> str:
-        return "{name} = fields.CharField({pk}{unique}{length}{null}{default}{comment})".format(
+        return "{name} = fields.CharField({pk}{index}{length}{null}{default}{comment})".format(
             **kwargs
         )
 
     @classmethod
     def int_field(cls, **kwargs) -> str:
-        return "{name} = fields.IntField({pk}{unique}{comment})".format(**kwargs)
+        return "{name} = fields.IntField({pk}{index}{comment})".format(**kwargs)
 
     @classmethod
     def smallint_field(cls, **kwargs) -> str:
-        return "{name} = fields.SmallIntField({pk}{unique}{comment})".format(**kwargs)
+        return "{name} = fields.SmallIntField({pk}{index}{comment})".format(**kwargs)
 
     @classmethod
     def bigint_field(cls, **kwargs) -> str:
-        return "{name} = fields.BigIntField({pk}{unique}{default}{comment})".format(**kwargs)
+        return "{name} = fields.BigIntField({pk}{index}{default}{comment})".format(**kwargs)
 
     @classmethod
     def bool_field(cls, **kwargs) -> str:
@@ -147,7 +152,7 @@ class Inspect:
 
     @classmethod
     def uuid_field(cls, **kwargs) -> str:
-        return "{name} = fields.UUIDField({pk}{unique}{default}{comment})".format(**kwargs)
+        return "{name} = fields.UUIDField({pk}{index}{default}{comment})".format(**kwargs)
 
     @classmethod
     def json_field(cls, **kwargs) -> str:

aerich/inspect/mysql.py

@@ -30,9 +30,25 @@ class InspectMySQL(Inspect):
 
     async def get_columns(self, table: str) -> List[Column]:
         columns = []
-        sql = "select * from information_schema.columns where TABLE_SCHEMA=%s and TABLE_NAME=%s"
+        sql = """select c.*, s.NON_UNIQUE, s.INDEX_NAME
+from information_schema.COLUMNS c
+         left join information_schema.STATISTICS s on c.TABLE_NAME = s.TABLE_NAME
+    and c.TABLE_SCHEMA = s.TABLE_SCHEMA
+    and c.COLUMN_NAME = s.COLUMN_NAME
+where c.TABLE_SCHEMA = %s
+  and c.TABLE_NAME = %s"""
         ret = await self.conn.execute_query_dict(sql, [self.database, table])
         for row in ret:
+            non_unique = row["NON_UNIQUE"]
+            if non_unique is None:
+                unique = False
+            else:
+                unique = not non_unique
+            index_name = row["INDEX_NAME"]
+            if index_name is None:
+                index = False
+            else:
+                index = row["INDEX_NAME"] != "PRIMARY"
             columns.append(
                 Column(
                     name=row["COLUMN_NAME"],
@@ -43,6 +59,8 @@ class InspectMySQL(Inspect):
                     comment=row["COLUMN_COMMENT"],
                     unique=row["COLUMN_KEY"] == "UNI",
                     extra=row["EXTRA"],
+                    unque=unique,
+                    index=index,
                     length=row["CHARACTER_MAXIMUM_LENGTH"],
                     max_digits=row["NUMERIC_PRECISION"],
                     decimal_places=row["NUMERIC_SCALE"],

aerich/inspect/postgres.py

@@ -54,7 +54,7 @@ from information_schema.constraint_column_usage const
          right join information_schema.columns c using (column_name, table_catalog, table_schema, table_name)
 where c.table_catalog = $1
   and c.table_name = $2
-  and c.table_schema = $3;"""
+  and c.table_schema = $3"""
         ret = await self.conn.execute_query_dict(sql, [self.database, table, self.schema])
         for row in ret:
             columns.append(
@@ -69,6 +69,7 @@ where c.table_catalog = $1
                     comment=row["column_comment"],
                     pk=row["column_key"] == "PRIMARY KEY",
                     unique=False,  # can't get this simply
+                    index=False,  # can't get this simply
                 )
             )
         return columns

aerich/inspect/sqlite.py

@@ -25,6 +25,7 @@ class InspectSQLite(Inspect):
         columns = []
         sql = f"PRAGMA table_info({table})"
         ret = await self.conn.execute_query_dict(sql)
+        columns_index = await self._get_columns_index(table)
         for row in ret:
             try:
                 length = row["type"].split("(")[1].split(")")[0]
@@ -38,11 +39,22 @@ class InspectSQLite(Inspect):
                     default=row["dflt_value"],
                     length=length,
                     pk=row["pk"] == 1,
-                    unique=False,  # can't get this simply
+                    unique=columns_index.get(row["name"]) == "unique",
+                    index=columns_index.get(row["name"]) == "index",
                 )
             )
         return columns
 
+    async def _get_columns_index(self, table: str):
+        sql = f"PRAGMA index_list ({table})"
+        indexes = await self.conn.execute_query_dict(sql)
+        ret = {}
+        for index in indexes:
+            sql = f"PRAGMA index_info({index['name']})"
+            index_info = (await self.conn.execute_query_dict(sql))[0]
+            ret[index_info["name"]] = "unique" if index["unique"] else "index"
+        return ret
+
     async def get_all_tables(self) -> List[str]:
         sql = "select tbl_name from sqlite_master where type='table' and name!='sqlite_sequence'"
         ret = await self.conn.execute_query_dict(sql)