mongodb刷新页面报错 Cannot overwrite `` model once compiled_cannot overwrite `user` model once compiled.-优快云博客

本文链接：https://blog.youkuaiyun.com/apple_52225781/article/details/134136583

文章描述了如何使用Mongoose在Node.js中创建和查询grid1080_1920-arcgis模型，并在查询后执行数据库操作，最后提及删除模型的条件。

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修改之前：

const Schema = mongoose.Schema;
      const grid1080_1920 = new Schema({
        _id: String,
        airport: String,
        camera_direction: String,
        point_data: Object,
        index_data: Object,
        gis_data: Object,
        camera_id: String,
      });
      const modelName = 'grid1080_1920-arcgis';
     
      const  Blog = mongoose.model(modelName, grid1080_1920)
      let a = () => {
        return new Promise(function (resolve, reject) {
          Blog.find().then((data:any)=>{
            resolve(data)
          })
        })
      }
      let sth = await a()
      ctx.body = sth
      mongoose.connection.close();

修改之后：

const Schema = mongoose.Schema;
      const grid1080_1920 = new Schema({
        _id: String,
        airport: String,
        camera_direction: String,
        point_data: Object,
        index_data: Object,
        gis_data: Object,
        camera_id: String,
      });
      const modelName = 'grid1080_1920-arcgis';
     
      const  Blog = mongoose.model(modelName, grid1080_1920)
      let a = () => {
        return new Promise(function (resolve, reject) {
          Blog.find().then((data:any)=>{
            resolve(data)
          })
        })
      }
      let sth = await a()
      ctx.body = sth
      mongoose.connection.close();
      if (mongoose.models[modelName] != null) {
        const Blog = mongoose.deleteModel(modelName)
      }