node.js - Mongoose Schema - Requiring one to be unique but not both -

i want store email string , password 1 needs unique. can use same email address 2 different passwords (or 100) , have 100 accounts passwords must different should still able have same password else long email address not same.

i can't seem find example of sort of thing in of mongoose schema docs.

using adreas suggestion have:

var userschema = new schema({     email: {         type: string,         required: true,         index: true     },     password: {         type: string,         required: true,         index: true     } }); //either email or password must unique if other not userschema.index({     "email": 1,     "password": 1 }, {     unique: true });  module.exports = mongoose.model('user', userschema); 

it's still letting me use same email same pass.

compound index should need.

user.index({ email: 1, hashedpassword: 1 }, { unique: true }); 

implementing might security risk though, have have same salt on both accounts. don't store plain-text pls.