oqoq590405
@oqoq590405
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ํด๋์ค ์ํฌํธ ์ค๋ฅ
import ๋ถ๋ถ๊ณผ List, List๋ถ๋ถ์์ ๋นจ๊ฐ์ค์ด ๋น๋๋ค.
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ํด๋์ค ์ํฌํธ ์ค๋ฅ
package jpabook.jpashop.domain.item;import jpabook.jpashop.domain.Category;import lombok.Getter;import lombok.Setter;import javax.persistence.*;import java.util.ArrayList;import java.util.List;@Entity@Inheritance(strategy = InheritanceType.SINGLE_TABLE)@DiscriminatorColumn(name = "dtype")@Getter @Setterpublic abstract class Item { @Id @GeneratedValue @Column(name = "item_id") private Long id; private String name; private int price; private int stockQuantity; @ManyToMany(mappedBy = "items") private List categories = new ArrayList();}
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ํด๋์ค ์ํฌํธ ์ค๋ฅ
package jpabook.jpashop.domain;import jpabook.jpashop.domain.item.Item;import lombok.Getter;import lombok.Setter;import javax.persistence.*;import java.util.ArrayList;import java.util.List;@Entity@Getter@Setterpublic class Category { @Id @GeneratedValue @Column(name = "category_id") private Long id; private String name; @ManyToMany @JoinTable(name = "category_item", joinColumns = @JoinColumn(name = "category_id"), inverseJoinColumns = @JoinColumn(name = "item_id")) private List items = new ArrayList(); //๊ด๊ณํ DB์์๋ ๋ค๋๋ค๋ฅผ -> 1๋๋ค, ๋ค๋1๋ก ํ์ด๋ด๋ ์ค๊ฐ ํ ์ด๋ธ์ด ํ์ @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "parent_id") private Category parent; @OneToMany(mappedBy = "parent") private List child = new ArrayList(); //==์ฐ๊ด๊ด๊ณ ๋ฉ์๋==// public void addChildCategory(Category child) { this.child.add(child); child.setParent(this); }}
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ํด๋์ค ์ํฌํธ ์ค๋ฅ
์ด๋ฏธ์ง๋ ์ฒจ๋ถ๊ฐ ์๋๋ค์..
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TypeError: Cannot read property 'prototype' of undefined
andrewlee ๋ ๊ฐ์ฌํฉ๋๋ค ใ
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vscode source control ๋ฌดํ ๋ก๋ฉ
์๋์ ๊นํ๋ธ์๋ ์ฌ๋ผ๊ฐ์ง ์์์ต๋๋ค. ๊ทผ๋ฐ vscdoe ์ข ๋ฃํ๊ณ ๋ค์ ์คํํ๋ ํด๊ฒฐ๋์์ต๋๋ค;;; ๊ฐ์ฌํฉ๋๋ค ใ ใ
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์์ ์ด ๊ฐ์๋ฅผ ๋ณด์๋ ๋ถ๊ป..webpack.config.js์ ๊ดํด์
"devDependencies": { "@babel/core": "^7.11.1", "@babel/plugin-proposal-class-properties": "^7.10.4", "@babel/preset-env": "^7.11.0", "@babel/preset-react": "^7.10.4", "babel-loader": "^8.1.0", "webpack": "^4.44.1", "webpack-cli": "^3.3.12", "webpack-dev-server": "^3.11.0" }, ------------------------------------- module: { rules: [ { test: /\.js$/, loader: 'babel-loader', exclude: /node_modules/, query: { cacheDirectory: true, presets: ['@babel/preset-env', '@babel/preset-react'] } } ] }, ์ด๋ ๊ฒ ๋ณ๊ฒฝํด๋ณด๋ ๋์๊ฐ๋๋ค.
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