@jianghujs/jianghu
Version:
Progressive Enterprise Framework
48 lines (40 loc) • 1.54 kB
JavaScript
;
const { nanoid } = require("nanoid");
const _ = require("lodash");
/**
* Tip:
* - 前端使用: const nanoid=(t=21)=>{let e="",r=crypto.getRandomValues(new Uint8Array(t));for(;t--;){let n=63&r[t];e+=n<36?n.toString(36):n<62?(n-26).toString(36).toUpperCase():n<63?"_":"-"}return e};
* @param {*} n
* @returns
*/
module.exports.uuid = (n = 21) => {
return nanoid(n);
};
module.exports.timestamp_6number = () => {
return `${Date.now()}_${_.random(100000, 999999)}`;
};
module.exports.randomString = length => {
const charList = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz123456789';
const charListLength = charList.length;
let string = '';
for (let i = 0; i < length; i++) string += charList.charAt(Math.floor(Math.random() * charListLength));
return string;
};
module.exports.idPlus = async ({ knex, tableName, columnName, startValue=10000, plusValue=1 }) => {
if (!knex || !tableName || !columnName) {
throw new Error("idPlus, 数据异常");
}
// const maxBizIdResult = await knex(tableName)
// .max(columnName, {
// as: "maxBizId",
// })
// .first();
// Knex的max某些情况获取不到最大id值，改成原生写法
const [maxBizIdResultRaw] = await knex.raw(`SELECT MAX(??) as maxBizId FROM ??`, [columnName, tableName]);
const maxBizIdResult = Array.isArray(maxBizIdResultRaw) ? maxBizIdResultRaw[0] : maxBizIdResultRaw;
if (!maxBizIdResult.maxBizId) {
return startValue;
} else {
return parseInt(maxBizIdResult.maxBizId) + plusValue;
}
};