Type of FilterQuery<T>

General
#1

If you are asking a question, please follow this template:

  1. My goal is: create a util function to get the data within last 12 months.
  2. My actions are:
import { Document, Model } from "mongoose";

interface MonthData {
    month: string;
    count: number;
}

export async function generateLast12MonthsData<T extends Document>(model: Model<T>): Promise<{ last12Months: MonthData[] }>{
    const last12Months:MonthData[] = [];

    const currentDate = new Date();
    currentDate.setDate(currentDate.getDate() + 1);

    for (let i=11; i>=0; i--) {
        const endDate = new Date(
            currentDate.getFullYear(), 
            currentDate.getMonth(), 
            currentDate.getDate() - i * 28,
        );
        
        const startDate = new Date(
            endDate.getFullYear(), 
            endDate.getMonth(), 
            endDate.getDate() - 28,
        );

        const monthYear = endDate.toLocaleString(
            "default", 
            {
                day: "numeric", 
                month: "short", 
                year: "numeric",
            }
        ); 

        const count = await model.countDocuments(
            {
                createdAt:
                {
                    $gte: startDate,
                    $lt: endDate,
                }
            }
        );
        
        last12Months.push(
            {
                month: monthYear,
                count,
            }
        );
    };
            
    return { last12Months };
}
  1. The result I see is:
Argument of type '{ createdAt: { $gte: Date; $lt: Date; }; }' is not assignable to parameter of type 'FilterQuery<T>'.
  Type '{ createdAt: { $gte: Date; $lt: Date; }; }' is not assignable to type '{ [P in keyof T]?: Condition<T[P]> | undefined; }'.
  1. My expectation & question is: fix the error and understand how the error is thrown.
#2

Wrong forum.
Here we discuss about Mongoose-OS

#3