import sqlite3
import json

conn = sqlite3.connect('cms.db')
c = conn.cursor()

# 把 news 模块的 content 从 {"count": 4} 改为 {"posts": [null, null, null, null]}
c.execute("UPDATE home_modules SET content = ? WHERE type = 'news'",
          (json.dumps({"posts": [None, None, None, None]}),))
print(f'已更新 {c.rowcount} 条 news 模块')
conn.commit()

# 验证
c.execute("SELECT content FROM home_modules WHERE type='news'")
print('新 content:', c.fetchone()[0])
conn.close()