Define node with a unique property in neo4django

Question

I've defined a graph structure in my project that currently contains 2 type of nodes: User and Post. I have installed neo4django on Django framework and define models.py like below:

from neo4django.db import models


class User(models.NodeModel):
    #firstname of the user that registered in first time
    firstName = models.StringProperty(max_length=20)

    #lastname of the user that registered in first time
    lastName = models.StringProperty(max_length=20)

    #password of user that selected by user
    password = models.StringProperty(max_length=50)

    #email that use for verification
    email = models.EmailProperty()

    #status of the user that can be 1 for online and 0 for offline
    status = models.BooleanProperty()

    #date of birth that user selected from the register form
    #BirthDate = models.DateProperty()

    #sex of the user that can be male and female (0=male,1=female)
    gender = models.BooleanProperty()

I want to use the email address and password for login then email must be unique in the database. How can I do this in models.py?

Answer 1

You can pass unique=True to any Property subclass. Unique properties have to be indexed, so:

email = models.EmailProperty(indexed=True, unique=True)