Discord.js命令选项choices超25限制的解决方法咨询

我用Node.js的Discord.js开发Discord机器人，JSON文件里存了30条货币数据。把这些数据作为命令选项的choices时，因为Discord限制choices最多只能有25个，触发了DiscordAPIError[50035]错误。试过排序但没用，求Node.js里的解决办法。

代码示例：

const currencyData = require("../../json/commands/currency.json");
const currencyChocies = currencyData.currency;
module.exports = {
  deleted: false,
  name: "pricecurrency",
  description: "Currency Price",
  type: ApplicationCommandOptionType.String,
  options: [
    {
      name: "currency",
      description: "currency name",
      type: ApplicationCommandOptionType.String,
      choices: currencyChocies,
      required: true,
    },
  ],
  callback: async (client, interaction) => {
    const currencyName = interaction.options.getString("currency");
    try {
      const data = await fetchCurrencyData("Currency");
      const desiredCurrency = data.find(
        (item) => item.detailsId === currencyName
      );

      if (desiredCurrency) {
        const chaosEquivalent = desiredCurrency.chaosEquivalent;
        const currencyTypeName = desiredCurrency.currencyTypeName;
        interaction.reply(
          "Name:" + currencyTypeName + "  Chaos Price:" + chaosEquivalent
        );
      } else {
        interaction.reply("Nothing Found Currency");
      }
    } catch (error) {
      console.log(error);
      await interaction.reply("API Error");
    }
  },
};

错误信息：

DiscordAPIError[50035]: Invalid Form Body
options[0].choices[BASE_TYPE_MAX_LENGTH]: Must be 25 or fewer in length.

DiscordAPIError[50035]: 无效的请求体
options[0].choices[BASE_TYPE_MAX_LENGTH]: 长度必须小于等于25。

解决方案 #

方法1：用Discord自动补全（Autocomplete）功能 #

Discord的命令选项支持自动补全，这个功能没有25个选项的限制，用户输入时会实时匹配显示相关结果。修改代码如下：

const currencyData = require("../../json/commands/currency.json");
const currencyList = currencyData.currency;
module.exports = {
  deleted: false,
  name: "pricecurrency",
  description: "Currency Price",
  options: [
    {
      name: "currency",
      description: "currency name",
      type: ApplicationCommandOptionType.String,
      required: true,
      autocomplete: true, // 开启自动补全
    },
  ],
  // 处理自动补全请求
  autocomplete: async (interaction) => {
    const userInput = interaction.options.getFocused();
    // 过滤匹配用户输入的货币，转小写避免大小写问题
    const matchedCurrencies = currencyList.filter(item => 
      item.name.toLowerCase().includes(userInput.toLowerCase())
    );
    // 一次最多返回25个结果（Discord自动补全的限制）
    await interaction.respond(matchedCurrencies.slice(0, 25));
  },
  callback: async (client, interaction) => {
    const currencyName = interaction.options.getString("currency");
    try {
      const data = await fetchCurrencyData("Currency");
      const desiredCurrency = data.find(
        (item) => item.detailsId === currencyName
      );

      if (desiredCurrency) {
        const chaosEquivalent = desiredCurrency.chaosEquivalent;
        const currencyTypeName = desiredCurrency.currencyTypeName;
        interaction.reply(
          `Name: ${currencyTypeName}  Chaos Price: ${chaosEquivalent}`
        );
      } else {
        interaction.reply("Nothing Found Currency");
      }
    } catch (error) {
      console.log(error);
      await interaction.reply("API Error");
    }
  },
};

方法2：让用户手动输入，事后验证有效性 #

去掉choices选项，让用户直接输入货币名称/ID，在回调里先验证输入是否在你的货币列表中：

const currencyData = require("../../json/commands/currency.json");
// 把所有有效的货币ID存到Set里，方便快速验证
const validCurrencyIds = new Set(currencyData.currency.map(item => item.value));
module.exports = {
  deleted: false,
  name: "pricecurrency",
  description: "Currency Price",
  options: [
    {
      name: "currency",
      description: "currency name or ID",
      type: ApplicationCommandOptionType.String,
      required: true,
      // 移除choices字段
    },
  ],
  callback: async (client, interaction) => {
    const currencyName = interaction.options.getString("currency");
    // 先检查输入是否有效
    if (!validCurrencyIds.has(currencyName)) {
      return interaction.reply("Invalid currency name/ID, please check and try again.");
    }
    try {
      const data = await fetchCurrencyData("Currency");
      const desiredCurrency = data.find(
        (item) => item.detailsId === currencyName
      );

      if (desiredCurrency) {
        const chaosEquivalent = desiredCurrency.chaosEquivalent;
        const currencyTypeName = desiredCurrency.currencyTypeName;
        interaction.reply(
          `Name: ${currencyTypeName}  Chaos Price: ${chaosEquivalent}`
        );
      } else {
        interaction.reply("Nothing Found Currency");
      }
    } catch (error) {
      console.log(error);
      await interaction.reply("API Error");
    }
  },
};

方法3：拆分命令（可选） #

如果不想用自动补全或手动输入，可以把货币分成几组（比如常用/稀有），创建多个子命令，每个子命令的choices不超过25个。但这种方法会增加命令数量，灵活性不如前两种。

内容的提问来源于stack exchange，提问作者ayberkgezer