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                            1.模型層是什么
*  位于django視圖層和數據庫之間
* python對象和數據庫表之間的轉換

2.為什么需要模型層
* 屏蔽不同數據庫之間的差異
* 開發者更加專注于業務邏輯的開發
* 提供更多便捷工具有助于開發

3.模型層的相關配置

```
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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