TODO:bug fix

src/main/java/com/example/springdemo/entities/Dishes.java

@@ -26,8 +26,7 @@ public class Dishes {
     private BigDecimal finalPrice;//菜品最终价格
     private String description;//菜品描述
 
-    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
     @JoinColumn(name = "merchantsID", referencedColumnName = "id")
-    @Column(name = "merchantsID")
     private Merchants merchants;//商家
 }

src/main/java/com/example/springdemo/entities/Merchants.java

@@ -3,6 +3,7 @@ package com.example.springdemo.entities;
 import jakarta.persistence.*;
 import lombok.*;
 
+import java.util.ArrayList;
 import java.util.List;
 
 @Data
@@ -23,6 +24,5 @@ public class Merchants {
 
     //商家和菜品是一对多的关系，有mappedBy的时候，表示Merchants的dishes 字段放弃维护权，而将维护权交给了Dishes的关联属性merchants
     @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "merchants")
-    @Column(name = "dishesID")
-    private List<Dishes> dishes;//菜品
+    private List<Dishes> dishes = new ArrayList<>();//菜品
 }

src/main/java/com/example/springdemo/entities/OrderDishes.java

@@ -19,15 +19,14 @@ public class OrderDishes {
     private Long id;//主键ID
 
     @OneToOne(cascade = CascadeType.ALL)
-    @JoinColumn(name = "dishesID", referencedColumnName = "id")
-    @Column(name = "dishesID")
+    @PrimaryKeyJoinColumn(name = "dishesID", referencedColumnName = "id")
     private Dishes dishes;//菜品ID
 
     @OneToOne(cascade = CascadeType.ALL)
-    @JoinColumn(name = "merchantsID", referencedColumnName = "id")
+    @PrimaryKeyJoinColumn(name = "merchantsID", referencedColumnName = "id")
     private Merchants merchants;//商家ID
 
-    @ManyToOne(cascade = CascadeType.ALL)
+    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
     @JoinColumn(name = "ordersID", referencedColumnName = "id")
     private Orders orders;//订单ID
 }

src/main/java/com/example/springdemo/entities/Orders.java

@@ -1,13 +1,11 @@
 package com.example.springdemo.entities;
 
 import jakarta.persistence.*;
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Data;
-import lombok.NoArgsConstructor;
+import lombok.*;
 import org.springframework.data.annotation.CreatedDate;
 
 import java.math.BigDecimal;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
@@ -24,12 +22,11 @@ public class Orders {
     private Long id;//订单ID
 
     @OneToMany(cascade = CascadeType.ALL, mappedBy = "orders")
-    @Column(name = "orderDishesID")
-    private List<OrderDishes> orderDishes;//订单中的菜品
+    private List<OrderDishes> orderDishes = new ArrayList<>();//订单中的菜品
 
-    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
-    @JoinColumn(name = "usersID", referencedColumnName = "id")
-    @Column(name = "usersID")
+    //多个订单对应一个用户，关系是多对一，订单创建后添加用户ID，可以主动改变关系，因此是主控方
+    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @JoinTable()
     private Users user;//外键，下单用户
 
     @Column(name = "allPrice")

src/main/java/com/example/springdemo/entities/RBAC/RolesPermissions.java

@@ -14,9 +14,11 @@ public class RolesPermissions {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;//主键
+
     @OneToMany(targetEntity = Roles.class, cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     @Column(name = "RolesID")
     private List<Roles> roles;//角色ID
+
     @OneToMany(targetEntity = Permissions.class, cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     @Column(name = "PermissionsID")
     private List<Permissions> permissions;//权限ID

src/main/java/com/example/springdemo/entities/Users.java

@@ -7,6 +7,7 @@ import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.util.ArrayList;
 import java.util.List;
 
 //用户类
@@ -26,12 +27,12 @@ public class Users {
     private String phoneNumber;//用户联系方式
     private String address;//家庭住址
 
-    @OneToMany(cascade = CascadeType.ALL, mappedBy = "user")
-    @Column(name = "ordersID")
-    private List<Orders> orders;//订单
+    //一个用户可能会有多个订单，关系是一对多
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @JoinColumn(name = "id")
+    private List<Orders> orders = new ArrayList<>();//订单
 
-    @ManyToOne(cascade = CascadeType.ALL)
+    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
     @JoinColumn(name = "rolesID", referencedColumnName = "id")
-    @Column(name = "rolesID")
     private Roles roles;//RBAC角色
 }

src/main/java/com/example/springdemo/entities/password/MerchantsPassword.java

@@ -12,8 +12,7 @@ import lombok.NoArgsConstructor;
 public class MerchantsPassword {
     @Id
     @OneToOne
-    @Column(name = "merchantID")
-    @JoinColumn(name = "merchantID", referencedColumnName = "id")
+    @PrimaryKeyJoinColumn(name = "merchantID", referencedColumnName = "id")
     private Merchants merchants;
     private String password;
 }

src/main/java/com/example/springdemo/entities/password/UsersPassword.java

@@ -12,8 +12,7 @@ import lombok.NoArgsConstructor;
 public class UsersPassword {
     @Id
     @OneToOne
-    @Column(name = "userID")
-    @JoinColumn(name = "userID", referencedColumnName = "id")
+    @PrimaryKeyJoinColumn(name = "userID", referencedColumnName = "id")
     private Users users;
     private String password;
 }