django模型自动创建

应用场景，对于数据分表查询的时候，非常有用，比如历史某些数据比较大，每个月一个表，这就需要用到动态加载表。

# -*- coding: utf-8 -*-
from django.contrib import admin
from django.db import models

def create_model(model_name,  app_label='', fields=None, module='', meta_options=None, admin_options=None):
"""
Create specified model
"""
class Meta:
# Using type('Meta', ...) gives a dictproxy error during model creation
pass

if app_label:
# app_label must be set using the Meta inner class
setattr(Meta, 'app_label', app_label)

# Update Meta with any options that were provided
if meta_options is not None:
for key, value in meta_options.iteritems():
setattr(Meta, key, value)

# Set up a dictionary to simulate declarations within a class
attrs = {'__module__': module, 'Meta': Meta}

# Add in any fields that were provided
if fields:
attrs.update(fields)

# Create the class, which automatically triggers ModelBase processing
model = type(model_name, (models.Model,), attrs)

# Create an Admin class if admin options were provided
if admin_options is not None:
class Admin(admin.ModelAdmin):
pass
for key, value in admin_options.items():
setattr(Admin, key, value)
admin.site.register(model, Admin)

return model