If any of the values passed into the class do not match their respective data type, an error will be raised! You'll also note the use of EmailField, BinaryField FloatField and BooleanField which we've used to define the data type we expect for their respective field.
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date_created = DateTimeField(default=datetime.utcnow) - default=datetime.utcnow will create a utcnow datetime object on creation of the document.bio = StringField(max_length=100) - We've used max_length=100 to set a maximum length of the user bio.admin = BooleanField(default=False) - We've set default=False in the admin field as it's something that should be explicitly set as True.username = StringField(required=True, unique=True) - We've set required and unique to True as the username value must provided and be unique.
#SIMPLE MONGODB PYTHON EXAMPLE PASSWORD#
We start out by creating a new class which inherits from Document and create a few class attributes:Ĭlass User ( Document ): username = StringField ( required = True, unique = True ) email = EmailField ( required = True ) password = BinaryField ( required = True ) first_name = StringField () last_name = StringField () age = IntField () bio = StringField ( max_length = 100 ) categories = ListField () admin = BooleanField ( default = False ) registered = BooleanField ( default = False ) rating = FloatField ( default = 0.0 ) page_views = IntField ( default = 0 ) signed_in = BooleanField ( default = False ) last_sign_in = DateTimeField () date_created = DateTimeField ( default = datetime.
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In this example, we'll create a new schema for a user of a web application: ReferenceField - Accepts a reference to another document.DateTimeField - Accepts Datetime values.
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Mongoengine features over 30, pre-defined fields which we can use for validation, including: Tip - Use environment variables or a configuration file (outside of source control) to access the database credentials Document schemaĭefining a document schema with Mongoengine is as easy as creating a new class and using some of the Mongoengine fields to validate the document values. Connect ( db = "demo-db", username = "root", password = "example", authentication_source = "admin", host = "localhost", port = 27017 )