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树结构建模¶
MongoDB
- 树结构建模：父文档引用
- Presents a data model that organizes documents in a tree-like structure by storing references to “parent” nodes in “child” nodes.
- 树结构建模： 子文档引用
- Presents a data model that organizes documents in a tree-like structure by storing references to “child” nodes in “parent” nodes.
- 树结构建模： 祖先数组
- Presents a data model that organizes documents in a tree-like structure by storing references to “parent” nodes and an array that stores all ancestors.
- 树结构建模： 物化路径
- Presents a data model that organizes documents in a tree-like structure by storing full relationship paths between documents. In addition to the tree node, each document stores the _id of the nodes ancestors or path as a string.
- 树结构建模： 嵌套集合
- Presents a data model that organizes documents in a tree-like structure using the Nested Sets pattern. This optimizes discovering subtrees at the expense of tree mutability.