DiscordAPIError:无法发送空消息。但是，我可以将我尝试发送到控制台的内容记录下来，发送的数据来自MongoDB

import discord
from pymongo import MongoClient

# 连接到MongoDB
client = MongoClient('mongodb://localhost:27017/')
db = client['your_database']
collection = db['your_collection']

# 创建Discord客户端
intents = discord.Intents.default()
intents.messages = True
bot = discord.Client(intents=intents)

@bot.event
async def on_ready():
    print(f'Bot is ready. Connected to {len(bot.guilds)} guilds.')

@bot.event
async def send_message_to_discord(channel_id):
    channel = bot.get_channel(channel_id)
    if not channel:
        print(f"Channel with ID {channel_id} not found.")
        return

    # 从MongoDB获取数据
    message_data = collection.find_one({"some_key": "some_value"})
    if not message_data:
        print("No data found in MongoDB.")
        return

    message_content = message_data.get('message_content', '')

    # 检查消息内容是否为空
    if not message_content:
        print("Message content is empty. Cannot send empty message.")
        return

    try:
        await channel.send(message_content)
        print(f"Message sent successfully: {message_content}")
    except discord.Forbidden:
        print("Bot does not have permission to send messages in this channel.")
    except discord.HTTPException as e:
        print(f"Failed to send message: {e}")

# 替换为你的Discord Bot Token
bot.run('your_discord_bot_token')