how to check if information provided is in a different schema - mongodb

Question

On sign up page, I want to check if the email, first name and last name entered by the user is in the organization schema or not, if it's in the database then create a new user
my user schema:
const UserSchema = new mongoose.Schema(
{
organization: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Organization'
},
firstName: {
type: String,
required: [true, "First name is required"],
},
lastName: {
type: String,
required: [true, "Last name is required"],
},
email: {
type: String,
required: [true, "Email is required"],
validate: {
validator: (val) => /^([\w-\.]+#([\w-]+\.)+[\w-]+)?$/.test(val),
message: "Please enter a valid email",
},
},
password: {
type: String,
required: [true, "Password is required"],
minlength: [8, "Password must be 8 characters or longer"],
},
},
{ timestamps: true }
)
organization schema:
const OrganizationSchema = mongoose.Schema({
orgname: {
type: String
},
domain: {
type: String
},
users: [{
type: mongoose.Schema.Types.ObjectId,
ref: 'User' }
],
timestamp: {
type: Date,
default: Date.now
},
})
the answer might be easy to some but I am new to MongoDB

Answer 1

I think there's a problem in your conception.
How are you supposed to find user's firstname and lastname in the organisation entity?
The relation here is the following :
an Organization can have multiple users
a User can have an Organization
If you want your organization to be used a a "filter" for the signup process, you could do the following:
have an Organization schema that holds a whitelist of domain and (firstname / lastname) -> you can have a collection but it would duplicate a lot of information,
have a User schema that is linked to Organization like you did in your question.
You can optimize Organization schema by splitting it (to prevent info duplication for the orgname and domain) :
Schema Organization (name, domain)
Schema Whitelist (link to organization, firstname, lastname)
Schema User (link to organization)
Tell me if you need me to clarify something.