Django model definitions for Collector, Observation, and USDA Query

models.py

from django.db import models

# Collectors run for each county both when a new user requests data and periodically for existing users.
class Collector(models.Model):
	name = models.CharField(max_length=100)
	priority = models.IntField()

# Collectors create Observations
class Observation(models.Model):
	scientific_name = models.CharField(max_length=100)
	common_name = models.CharField(max_length=100)
	observation_time = models.DateTimeField()
	latitude = models.FloatField()
	longitude = models.FloatField()
	thumbnail = models.ImageField()
	image = models.URLField()
	credit = models.CharField(max_length=100)
	source = models.ForeignKey(Collector)

# Cache USDA queries by parameters and county
class USDAQuery(models.Model):
	name = models.CharField(max_length=100)
	last_run = models.DateTimeField()
	county_name = models.CharField(max_length=100)
	state_name = models.CharField(max_length=100)
	request_data = modelsTextField()
	response_data = modelsTextField()