admin can clone newsletter (#1938)

* admin can clone newsletter

- remove unique constraint on newsletter subject
- admin can clone newsletter

* update coupon image

---------

Co-authored-by: Son NK <son@simplelogin.io>

app/admin_model.py

@@ -611,6 +611,26 @@ class NewsletterAdmin(SLModelView):
             else:
                 flash(error_msg, "error")
 
+    @action(
+        "clone_newsletter",
+        "Clone this newsletter",
+    )
+    def clone_newsletter(self, newsletter_ids):
+        if len(newsletter_ids) != 1:
+            flash("you can only select 1 newsletter", "error")
+            return
+
+        newsletter_id = newsletter_ids[0]
+        newsletter: Newsletter = Newsletter.get(newsletter_id)
+        new_newsletter = Newsletter.create(
+            subject=newsletter.subject,
+            html=newsletter.html,
+            plain_text=newsletter.plain_text,
+            commit=True,
+        )
+
+        flash(f"Newsletter {new_newsletter.subject} has been cloned", "success")
+
 
 class NewsletterUserAdmin(SLModelView):
     column_searchable_list = ["id"]

app/models.py

@@ -3517,7 +3517,7 @@ class PartnerSubscription(Base, ModelMixin):
 
 class Newsletter(Base, ModelMixin):
     __tablename__ = "newsletter"
-    subject = sa.Column(sa.String(), nullable=False, unique=True, index=True)
+    subject = sa.Column(sa.String(), nullable=False, index=True)
 
     html = sa.Column(sa.Text)
     plain_text = sa.Column(sa.Text)

migrations/versions/2023_110714_4bc54632d9aa_.py

@@ -0,0 +1,31 @@
+"""empty message
+
+Revision ID: 4bc54632d9aa
+Revises: 46ecb648a47e
+Create Date: 2023-11-07 14:02:17.610226
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '4bc54632d9aa'
+down_revision = '46ecb648a47e'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index('ix_newsletter_subject', table_name='newsletter')
+    op.create_index(op.f('ix_newsletter_subject'), 'newsletter', ['subject'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_newsletter_subject'), table_name='newsletter')
+    op.create_index('ix_newsletter_subject', 'newsletter', ['subject'], unique=True)
+    # ### end Alembic commands ###