first commit

screens/flow/delete_flow_node.py

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+import db
+
+
+def delete_flow_node(slug, node_id):
+    conn = db.connect(slug)
+    conn.execute("DELETE FROM _flow_edges WHERE from_node_id = ? OR to_node_id = ?", (node_id, node_id))
+    conn.execute("DELETE FROM _flow_nodes WHERE id = ?", (node_id,))
+    conn.commit()
+    conn.close()