node.js - What is the correct way to make Validators with Mongoose -

i had userschema, first email, username , password fields own validators. wanted add more fields bio, location gender , birthday, own validators.

const userschema=new schema({     email: { type: string, required: true, unique: true, lowercase: true, validate: emailvalidators},     username: { type: string, required: true, unique: true, lowercase: true, validate: usernamevalidators},     password: { type: string, required: true,validate: passwordvalidators},     bio: { type:string,required:false,default:null,validate:biovalidators},     location: {type:string,required:false, default:null},     gender: {type:string,required:false,default:null,validate:gendervalidators},     birthday: { type:date,required:false,default:null} }); 

now problem when want register, it's running every validators, of course error occured because in register page i'm not asking bio, location etc ..

i tried adding required:false still not working , didn't find satisfying answer

edit

here's how create new user

router.post('/register',(req,res)=>{          if (!req.body.email) {             res.json({success:false,message: 'you must provide e-mail'});         }         else{             if (!req.body.username) {                 res.json({success:false,message:'you must provide username'});             }             else{                 if(!req.body.password){                     res.json({success:false,message:'you must provide password'});                 }                 else{                     let user= new user({                         email: req.body.email.tolowercase(),                         username: req.body.username.tolowercase(),                         password: req.body.password                     });                      user.save((err)=>{                         if (err) {                             if (err.code === 11000) {                                 res.json({success:false,message:'username or e-mail exists'});                             }else{                                 if (err.errors) {                                     if (err.errors.email) {                                         res.json({success:false, message:err.errors.email.message});                                     }                                     else{                                         if (err.errors.username) {                                             res.json({success:false,message:err.errors.username.message});                                         }                                         else{                                             if (err.errors.password) {                                                 res.json({success:false,message:err.errors.password.message});                                             }                                             else{                                                 res.json({ success:false,message:err});                                             }                                         }                                     }                                 }else{                                     res.json({success:false,message:'could not save user :', err});                                 }                             }                         }                         else{                             res.json({success:true,message:'account registered'})                         }                     });                 }             }          }     }); 

the errors biovalidator , gendervalidator.

in fact question is, how choose validator going executed.

edit

in order make work remove required , validators field follows:

const userschema=new schema({      email: { type: string, required: true, unique: true, lowercase: true, validate: emailvalidators},      username: { type: string, required: true, unique: true, lowercase: true, validate: usernamevalidators},      password: { type: string, required: true,validate: passwordvalidators},      bio: { type:string, default:null},      location: { type:string, default:null},      gender: { type:string, default:null},      birthday: { type:date, default:null}  });

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