“Что такое моделирование данных в MongoDB” Ответ

Что такое моделирование данных в MongoDB

- Data modeling is the process of defining how data is stored and what relationships exist between different entities in our data.
- Data modeling aims to visually represent the relationship between different entities in data. It also seeks to represent the data’s organization and grouping.

Type of modeling :

1. Embedded Documents:-
{
  _id: <ObjectId123>,
  title: "Data Modelling in MongoDB",
  body: "some long text...",
  comments: [
    { 
      _id: <ObjectId111>,
      comment: "some text...",
      author: "mike@email.com"     
    },
    { 
      _id: <ObjectId222>,
      comment: "some text...",
      author: "jake@email.com"    
    }
  ]
}

---------------------------------------------------------------
2. References:-
// blog post
{
  _id: <ObjectId123>,
  title: "Data Modelling in MongoDB",
  body: "some long text..."
}

// comments
{ 
  _id: <ObjectId111>,
  comment: "some text...",
  author: "mike@email.com",
  postId: <ObjectId123>. // reference to the blog post
},
{ 
  _id: <ObjectId222>,
  comment: "some text...",
  author: "jake@email.com",
  postId: <ObjectId123>    // reference to the blog post 
}