连接多个数据库

1.对于多个雷同的表 可以封装其相同部分

const router=require("koa-router")();
const MovieModel=require("../../models/movie")
router.get("/api/movie",async ctx=>{
    const {m}=ctx.query;
    try{
        var data=await MovieModel(m).find();
        console.log(data.length);
        if(data.length){
            ctx.body={
                code:200,
                res:data,
                msg:m
            }
        }else{
            throw new Error("输入字段不合法")
        }
    }catch(err){
        ctx.body={
            code:400,
            msg:"输入字段不合法"
        }
    }
})
module.exports=router;

const {mongodb,Schema} = require("./baseDB/db-movies");
const bean = require("./Schema/MoviesSchema")
const MovieSchema = new Schema(bean);
function MovieModel(table){
    return mongodb.model(table,MovieSchema,table)
}
module.exports = MovieModel;