From 5420c0a36426250cf913c0645f361a0dfd6e2da1 Mon Sep 17 00:00:00 2001
From: DeveloperAnonymous
 <40847862+DeveloperAnonymous@users.noreply.github.com>
Date: Tue, 4 Apr 2023 23:38:48 -0400
Subject: [PATCH 1/3] Made index_type a valid argument when creating an index

---
 tortoise/indexes.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tortoise/indexes.py b/tortoise/indexes.py
index 7ccf49fbb..96b386eb9 100644
--- a/tortoise/indexes.py
+++ b/tortoise/indexes.py
@@ -8,7 +8,6 @@
 
 
 class Index:
-    INDEX_TYPE = ""
     INDEX_CREATE_TEMPLATE = (
         "CREATE{index_type}INDEX {index_name} ON {table_name} ({fields}){extra};"
     )
@@ -18,6 +17,7 @@ def __init__(
         *expressions: Term,
         fields: Optional[Tuple[str, ...]] = None,
         name: Optional[str] = None,
+        index_type: Optional[str] = ""
     ):
         """
         All kinds of index parent class, default is BTreeIndex.
@@ -37,6 +37,8 @@ def __init__(
         self.name = name
         self.expressions = expressions
         self.extra = ""
+        self.index_type = index_type
+        
 
     def get_sql(self, schema_generator: "BaseSchemaGenerator", model: "Type[Model]", safe: bool):
         if self.fields:
@@ -45,7 +47,7 @@ def get_sql(self, schema_generator: "BaseSchemaGenerator", model: "Type[Model]",
                 index_name=schema_generator.quote(
                     self.name or schema_generator._generate_index_name("idx", model, self.fields)
                 ),
-                index_type=f" {self.INDEX_TYPE} ",
+                index_type=f" {self.index_type} ",
                 table_name=schema_generator.quote(model._meta.db_table),
                 fields=", ".join(schema_generator.quote(f) for f in self.fields),
                 extra=self.extra,
@@ -55,7 +57,7 @@ def get_sql(self, schema_generator: "BaseSchemaGenerator", model: "Type[Model]",
         return self.INDEX_CREATE_TEMPLATE.format(
             exists="IF NOT EXISTS " if safe else "",
             index_name=self.index_name(schema_generator, model),
-            index_type=f" {self.INDEX_TYPE} ",
+            index_type=f" {self.index_type} ",
             table_name=schema_generator.quote(model._meta.db_table),
             fields=", ".join(expressions),
             extra=self.extra,
@@ -72,8 +74,9 @@ def __init__(
         fields: Optional[Tuple[str, ...]] = None,
         name: Optional[str] = None,
         condition: Optional[dict] = None,
+        index_type: Optional[str] = ""
     ):
-        super().__init__(*expressions, fields=fields, name=name)
+        super().__init__(*expressions, fields=fields, name=name, index_type=index_type)
         if condition:
             cond = " WHERE "
             items = []

From bf4856c6994230b0bae9ccbde61d9b20809662d2 Mon Sep 17 00:00:00 2001
From: DeveloperAnonymous
 <40847862+DeveloperAnonymous@users.noreply.github.com>
Date: Tue, 4 Apr 2023 23:40:29 -0400
Subject: [PATCH 2/3] Made index_type a valid argument when creating an index

---
 tortoise/indexes.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tortoise/indexes.py b/tortoise/indexes.py
index 96b386eb9..d85ac27e3 100644
--- a/tortoise/indexes.py
+++ b/tortoise/indexes.py
@@ -8,6 +8,7 @@
 
 
 class Index:
+    INDEX_TYPE = ""
     INDEX_CREATE_TEMPLATE = (
         "CREATE{index_type}INDEX {index_name} ON {table_name} ({fields}){extra};"
     )
@@ -17,7 +18,7 @@ def __init__(
         *expressions: Term,
         fields: Optional[Tuple[str, ...]] = None,
         name: Optional[str] = None,
-        index_type: Optional[str] = ""
+        index_type: Optional[str] = None
     ):
         """
         All kinds of index parent class, default is BTreeIndex.
@@ -37,7 +38,7 @@ def __init__(
         self.name = name
         self.expressions = expressions
         self.extra = ""
-        self.index_type = index_type
+        self.index_type = index_type or self.INDEX_TYPE
         
 
     def get_sql(self, schema_generator: "BaseSchemaGenerator", model: "Type[Model]", safe: bool):

From dd51a0568ce4d6426f40bd5cefb4245ac35e2c22 Mon Sep 17 00:00:00 2001
From: DeveloperAnonymous
 <40847862+DeveloperAnonymous@users.noreply.github.com>
Date: Tue, 4 Apr 2023 23:41:22 -0400
Subject: [PATCH 3/3] made index_type arg none for partialindex

---
 tortoise/indexes.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tortoise/indexes.py b/tortoise/indexes.py
index d85ac27e3..65a6da632 100644
--- a/tortoise/indexes.py
+++ b/tortoise/indexes.py
@@ -75,7 +75,7 @@ def __init__(
         fields: Optional[Tuple[str, ...]] = None,
         name: Optional[str] = None,
         condition: Optional[dict] = None,
-        index_type: Optional[str] = ""
+        index_type: Optional[str] = None
     ):
         super().__init__(*expressions, fields=fields, name=name, index_type=index_type)
         if condition: