Tree View @Tree
The @Tree annotation displays data as a tree structure, suitable for hierarchical data such as organizational charts, category directories, and similar use cases.
Usage
java
@Erupt(
name = "Tree",
tree = @Tree(id = "id", label = "name", pid = "parent.id", expandLevel = 1)
)
public class Tree extends BaseModel {
@EruptField(
views = @View(title = "Name"),
edit = @Edit(title = "Name")
)
private String name;
@ManyToOne
@JoinColumn(name = "parent")
@EruptField(
edit = @Edit(
title = "Parent Node",
type = EditType.REFERENCE_TREE,
referenceTreeType = @ReferenceTreeType(pid = "parent.id")
)
)
private Tree parent;
}After completing the configuration and starting the project, go to System Management → Menu Management → Add → Menu Type = Tree, and enter the class name as the type value to use the tree view.
Annotation Definition
java
public @interface Tree {
String id() default "id"; // stored column
String label() default "name"; // display column
String pid() default ""; // if empty, renders as a flat list
/**
* Expand level. If the dataset is large, reduce this value for faster rendering.
* Can efficiently render hundreds of thousands of tree nodes.
*/
int expandLevel() default 999;
/**
* If the parent node id is null, Erupt treats it as a root node and starts rendering the tree.
* To change this behavior, implement @Expr to dynamically return a root node id.
* Recommended to use with filter to avoid leaking unneeded data to the frontend.
*/
Expr rootPid() default @Expr;
}Preview
Contributors
YuePeng