Nodejs - Getting mongoose typescript error

Question

Typescript error

I am using the same schema approach in all over my backend but only this one gives an error for some reason. It was running fine until this morning.

All the other schemas in the website have exactly the same approach but this one is throwing an error.

Error :

[ERROR] 19:52:58 ⨯ Unable to compile TypeScript:
src/models/project.ts(81,3): error TS2554: Expected 0-1 arguments, but got 2.
src/models/project.ts(83,17): error TS7006: Parameter 'doc' implicitly has an 'any' type.
src/models/project.ts(83,22): error TS7006: Parameter 'ret' implicitly has an 'any' type.
src/models/project.ts(90,15): error TS2551: Property 'statics' does not exist on type 'Schema'. 
Did you mean 'static'?

Schema :

interface ProjectAttrs {
  user: string;
  profile: string;
  title: string;
  image: string;
  description: string;
  type: categories;
}

export interface ProjectDoc extends mongoose.Document {
  user: string;
  profile: string;
  title: string;
  image: string;
  collabImages: string[];
  description: string;
  comments: string[];
  likes: number;
  likers: ProfileDoc[];
  state: boolean;
  // requesters: ProfileDoc[];
  requests: string[];
  team: string[];
  type: categories;
}

interface ProjectModel extends mongoose.Model<ProjectDoc> {
  build(attrs: ProjectAttrs): ProjectDoc;
}

const projectSchema = new mongoose.Schema(
  {
    user: { type: String, required: true },
    profile: {
      type: mongoose.Schema.Types.ObjectId,
      required: true,
      ref: "Profile",
    },
    title: { type: String, required: true },
    image: { type: String },
    collabImages: [{ type: String,
        required: false}],
    description: { type: String, required: true },
    comments: [{ type: mongoose.Schema.Types.ObjectId, ref: "Comment"}],
    state: { type: Boolean, default: true },
    likes: { type: Number, default: 0 },
    likers: [{ type: mongoose.Schema.Types.ObjectId, ref: "Profile"}],
    requests: [{ type: mongoose.Schema.Types.ObjectId, ref: "Request"}],
    team: [{ type: mongoose.Schema.Types.ObjectId, ref: "Profile"}],
    type: { type: String, required: true },
    createdAt: { type: Date, default: Date.now() },
  },
  {
    toJSON: {
      transform(doc, ret) { // ERROR 
        ret.id = ret._id;   // ERROR 
        delete ret._id;     // ERROR
      },
    },
  }
);
projectSchema.statics.build = (attrs: ProjectAttrs) => {
  return new Project(attrs);
};
const Project = mongoose.model<ProjectDoc, ProjectModel>(
  "Project",
  projectSchema
);
export { Project };

I wonder what is it that I am missing here. I would really appreciate the help.

I'm having the same error. Let me know if you find a solution please! — Jesus Mendoza
– Jesus Mendoza, Commented Dec 3, 2020 at 16:28
Its weird, I got rid of this error after I removed one of the route I recently created. Its not an issue with the schema. — Karan Kumar
– Karan Kumar, Commented Dec 3, 2020 at 18:50

Hector Ramirez · Accepted Answer · 2020-12-04 22:26:46Z

according to mongoose documentation some changes are needed.

please look following code

import mongoose from 'mongoose';

interface ProjectAttrs {
  user: string;
  profile: string;
  title: string;
  image: string;
  description: string;
  type: categories;
}

export interface ProjectDoc extends mongoose.Document {
  user: string;
  profile: string;
  title: string;
  image: string;
  collabImages: string[];
  description: string;
  comments: string[];
  likes: number;
  likers: ProfileDoc[];
  state: boolean;
  // requesters: ProfileDoc[];
  requests: string[];
  team: string[];
  type: categories;
}

interface ProjectModel extends mongoose.Model<ProjectDoc> {
  build(attrs: ProjectAttrs): ProjectDoc;
}

const projectSchema = new mongoose.Schema(
  {
    user: { type: String, required: true },
    profile: {
      type: mongoose.Schema.Types.ObjectId,
      required: true,
      ref: "Profile",
    },
    title: { type: String, required: true },
    image: { type: String },
    collabImages: [{ type: String,
        required: false}],
    description: { type: String, required: true },
    comments: [{ type: mongoose.Schema.Types.ObjectId, ref: "Comment"}],
    state: { type: Boolean, default: true },
    likes: { type: Number, default: 0 },
    likers: [{ type: mongoose.Schema.Types.ObjectId, ref: "Profile"}],
    requests: [{ type: mongoose.Schema.Types.ObjectId, ref: "Request"}],
    team: [{ type: mongoose.Schema.Types.ObjectId, ref: "Profile"}],
    type: { type: String, required: true },
    createdAt: { type: Date, default: Date.now() },
  }
);



//REVIEW THIS PART SINCE SOMETHING MIGHT BE MISSING
schema.set('toJson', {transform:function(doc: any, ret:any) {
  ret.id = ret._id;
  delete ret._id;
}});


//THIS WAS CHANGED NO LONGER STATICS
projectSchema.static('build', (attrs: ProjectAttrs) => {
  return new Project(attrs);
});


const Project = mongoose.model<ProjectDoc, ProjectModel>(
  "Project",
  projectSchema
);
export { Project };

Eduardo Cuomo · Accepted Answer · 2022-08-03 12:37:26Z

1

The solution I found was to remove @types/mongoose and update mongoose to its latest version. It seems like latest mongoose version already ships with its types included and it's causing a conflict.

edited Aug 3, 2022 at 12:37

Eduardo Cuomo

19.2k7 gold badges121 silver badges98 bronze badges

answered Dec 4, 2020 at 20:02

Jesus Mendoza

4133 silver badges18 bronze badges

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