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dataStore.py
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dataStore.py
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""" Defines the data models for the ASN """
from google.appengine.ext import db
from google.appengine.ext.db import polymodel
from validators import *
class Comment(db.Model):
"""
A model for Comments.
These are associated generally with ratings.
A comment is made of text, comment chains will require references to itself.
"""
text = db.TextProperty(required=True)
replyto = db.SelfReferenceProperty()
def __str__(self):
return str(self.text)
def __iter__(self):
yield ('text', self.text)
class Person(db.Model):
"""
A model for Persons.
A person has a first, middle and last name.
However, the middle name is not required.
"""
fname = db.StringProperty(required=True)
lname = db.StringProperty(required=True)
mname = db.StringProperty()
def __str__(self):
s = ""
s += self.fname
if self.mname:
s += ' i' + self.mname
s += ' ' + self.lname
return s
def __iter__(self):
d = self.__class__.properties()
for x in d:
yield (x,getattr(self,x))
def __eq__(self, other):
if not issubclass(type(other), Person): return False
for x,y in zip(self, other):
if x != y:
return False
return True
class User(db.Model):
"""
A User. Can be a student or admin.
"""
uid = db.StringProperty(required=True)
password = db.StringProperty(required=True)
userType = db.StringProperty(required=True, choices=['STUDENT','ADMIN'])
def __str__(self):
s = ""
s += "uid: " + self.uid + '\n'
s += "password: " + self.password + '\n'
return s
def __iter__(self):
d = self.__class__.properties()
for x in d: yield (x,getattr(self,x))
def __eq__(self, other):
if not issubclass(type(other), User): return False
for x,y in zip(self, other):
if x != y: return False
return True
class Ratable(polymodel.PolyModel):
"""
Ratable is the base class for ratable objects, and has
no inherent data.
"""
def __str__(self):
s = ""
for p in self.__class__.properties():
if p[0] != '_': s += p + ": " + str(getattr(self, p)) + '\n'
return s
def __iter__(self):
d = self.__class__.properties()
try:
d.pop('_class')
except KeyError:
print ''
print self.__class__.properties()
for x in d: yield (x, getattr(self, x))
def __eq__(self, other):
if not issubclass(type(other), Ratable): return False
for x,y in zip(self, other):
if x != y: return False
return True
class Rating(db.Model):
"""
A model for Ratings.
A rating has the rating itself,
a comment which may have a comment chain,
the rated object
and the rater that did the rating.
"""
rating = db.RatingProperty(required=True)
comment = db.ReferenceProperty(Comment)
rated = db.ReferenceProperty(Ratable, required=True)
rater = db.ReferenceProperty(User, required=True, validator=studentValidator)
def __iter__(self):
d = self.__class__.properties()
for x in d: yield (x,getattr(self,x))
class Course (Ratable):
"""
The model for Courses
A course has unique number, course number, and name.
It also has a semseter, instructor and year.
"""
unique = db.StringProperty(required=True,validator=uniqueValidator)
courseNum = db.StringProperty(required=True, validator=courseNumValidator)
name = db.StringProperty(required=True)
semester = db.StringProperty(required=True,choices=['FALL','SPRING','SUMMER'])
instructor = db.ReferenceProperty(Person, required=True)
year = db.StringProperty(required=True, validator=yearValidator)
def __str__(self):
s = """Unique: %s
Course #: %s
Name: %s
""" % (self.unique, self.courseNum, self.name)
return s.replace('\n','<br />')
class Grade(db.Model):
"""
The model for a Grade
A grade must be associated with a course, a student, and a grad.e
"""
course = db.ReferenceProperty(Course, required=True)
student = db.ReferenceProperty(User, required=True, validator=studentValidator)
grade = db.StringProperty(required=True, validator=gradeValidator)
def __str__(self):
return str(self.grade)
def __iter__(self):
d = self.__class__.properties()
for x in d: yield (x, getattr(self, x))
class Book(Ratable):
"""
The model for books.
A book must have an isbn, a title and author.
The author must be a person.
"""
isbn = db.StringProperty(required=True,validator=isbnValidator)
title = db.StringProperty(required=True)
author = db.ReferenceProperty(Person,required=True)
def __str__(self):
s = """Title: %s
Author: %s
ISBN: %s
""" % (self.title, str(self.author), self.isbn)
return s.replace('\n','<br />')
class Paper (Ratable):
"""
The model for papers.
Papers must have type of either JOURNAL or CONFERENCE
It must also have a title, and an author.
"""
paperType = db.StringProperty(required=True,choices=['JOURNAL','CONFERENCE'])
title = db.StringProperty(required=True)
author = db.ReferenceProperty(Person,required=True)
def __str__(self):
s = """Title: %s
Author: %s
Paper Type: %s
""" % (self.title, str(self.author), self.paperType.capitalize())
return s.replace('\n','<br />')
class Place (Ratable):
"""
The model for a place.
A place must have a name, location, semester, and year.
Latitude and longitude is optional, but are a future feature.
"""
name = db.StringProperty(required=True)
location = db.PostalAddressProperty(required=True)
semester = db.StringProperty(required=True,choices=['FALL','SPRING','SUMMER'])
year = db.StringProperty(required=True,validator=yearValidator)
#might be cool to do latlong
latLong = db.GeoPtProperty()
class Internship (Place):
"""
The model for an Internship
No additional data is required over what is given for a Place.
"""
pass
class PlaceLive (Place):
"""
The model for a living area.
No additional data is required over what is given for a Place.
"""
pass
class PlaceEat (Place):
"""
The model for a eating place.
No additional data is required over what is given for a place.
"""
pass
class PlaceFun (Place):
"""
The model for a fun place.
No additional data is required over what is given for a place.
"""
pass
class PlaceStudy (Place):
"""
The model for a study area.
No additional data is required over what is given for a place.
"""
pass
class Game (Ratable):
"""
The model for a game.
A game has a platform and a title.
"""
platform = db.StringProperty(required=True)
title = db.StringProperty(required=True)
class Session(db.Model) :
"""
The model for a session.
Used to keep track of who is logged in.
"""
sessionID = db.StringProperty(required=True)
user = db.ReferenceProperty(User)
message = db.StringProperty()
msgstatus = db.BooleanProperty(default=False)
generated = db.BooleanProperty(required=True)
expiration = db.DateTimeProperty(required=True)
deletionTarget = db.ReferenceProperty(Rating)
confirmedDelete = db.BooleanProperty(default=False)
def __iter__(self):
d = self.__class__.properties()
for x in d: yield (x, getattr(self, x))