add index for contact.reply_email col

app/models.py

@@ -1353,7 +1353,7 @@ class Contact(db.Model, ModelMixin):
     # This address allows to hide user personal email
     # this reply email is created every time a website sends an email to user
     # it has the prefix "reply+" or "ra+" to distinguish with other email
-    reply_email = db.Column(db.String(512), nullable=False)
+    reply_email = db.Column(db.String(512), nullable=False, index=True)
 
     # whether a contact is created via CC
     is_cc = db.Column(db.Boolean, nullable=False, default=False, server_default="0")

migrations/versions/2021_071310_78403c7b8089_.py

@@ -0,0 +1,29 @@
+"""empty message
+
+Revision ID: 78403c7b8089
+Revises: c31a081eab74
+Create Date: 2021-07-13 10:16:51.387510
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '78403c7b8089'
+down_revision = 'c31a081eab74'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_index(op.f('ix_contact_reply_email'), 'contact', ['reply_email'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_contact_reply_email'), table_name='contact')
+    # ### end Alembic commands ###