How to set Limit of a relation

Sorry to disturb you but you can help me with logic because i failed when actually use the logic

const { createCoreController } = require(’@strapi/strapi’).factories;

module.exports = createCoreController(‘api::blog.blog’ , ({ strapi }) => ({

async create(ctx) {

// some logic here

const response = await super.create(ctx);

// some more logic

console.log(response , "response");

console.log(ctx.request.body.data.Related_Blogs);



const count = await strapi.db.query(ctx.request.body.data.Related_Blogs).count();

console.log(count, "ctx");

return response;

  }

}));

Hope it helps to crack the logic