storage: add rate_limit_per_user fetching

the rate_limit_per_user field has been on schema.CHAN_UPDATE for a while
but the database didn't have the column.

 - migration.scripts: add 7_text_channels_rate_limit_per_user.sql
 - schema.sql: add guild_text_channels.rate_limit_per_user

litecord/storage.py

@@ -282,17 +282,19 @@ class Storage:
         chan_type = ChannelType(channel_type)
 
         if chan_type == ChannelType.GUILD_TEXT:
-            topic = await self.db.fetchval("""
+            ext_row = await self.db.fetchrow("""
-            SELECT topic FROM guild_text_channels
+            SELECT topic, rate_limit_per_user
+            FROM guild_text_channels
             WHERE id = $1
             """, row['id'])
 
+            drow = dict(ext_row)
+
             last_msg = await self.chan_last_message_str(row['id'])
 
-            return {**row, **{
+            drow['last_message_id'] = last_msg
-                'topic': topic,
+
-                'last_message_id': last_msg,
+            return {**row, **drow}
-            }}
 
         if chan_type == ChannelType.GUILD_VOICE:
             vrow = await self.db.fetchrow("""

manage/cmd/migration/scripts/7_text_channels_rate_limit_per_user.sql

@@ -0,0 +1,2 @@
+ALTER TABLE guild_text_channels
+ADD COLUMN rate_limit_per_user bigint DEFAULT 0;

schema.sql

@@ -356,6 +356,7 @@ CREATE TABLE IF NOT EXISTS guild_channels (
 CREATE TABLE IF NOT EXISTS guild_text_channels (
     id bigint REFERENCES guild_channels (id) ON DELETE CASCADE,
     topic text DEFAULT '',
+    rate_limit_per_user bigint DEFAULT 0,
     PRIMARY KEY (id)
 );