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feat: 채팅 관련 엔티티 및 DDL 작성 (#395)
* feat: 채팅 관련 엔티티 생성 * feat: 채팅 관련 테이블의 DDL 작성 * fix: DDL 콤마 누락 문제 해결 * feat: chat_participant 테이블에서 chat_room, site_user 간 고유 키 생성 * chore: ChatReadStatus 엔티티에 UK 제약조건 추가 * fix: JPA가 UK 제약 조건 생성 시 컬럼을 찾지 못하는 문제 해결 - 명시적으로 컬럼 이름을 지정한다. * chore: UK 제약 조건 이름 변경 * chore: isGroup, hasAttachment 필드에 기본값 생성 - 데이터 타입을 primitive type으로 지정 - Column 어노테이션 제거 (App level과 DB level 간 일관성 보장) - DDL에 기본값 설정 * chore: hasAttachment 컬럼 제거 * chore: flyway 파일 버전 수정
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‎src/main/java/com/example/solidconnection/chat/domain/ChatAttachment.java‎

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package com.example.solidconnection.chat.domain;
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import com.example.solidconnection.common.BaseEntity;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.ManyToOne;
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import lombok.AccessLevel;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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@Entity
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@Getter
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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public class ChatAttachment extends BaseEntity {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@Column(nullable = false)
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private Boolean isImage;
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@Column(nullable = false, length = 500)
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private String url;
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@Column(length = 500)
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private String thumbnailUrl;
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@ManyToOne(fetch = FetchType.LAZY)
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private ChatMessage chatMessage;
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}

‎src/main/java/com/example/solidconnection/chat/domain/ChatMessage.java‎

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package com.example.solidconnection.chat.domain;
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import com.example.solidconnection.common.BaseEntity;
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import jakarta.persistence.CascadeType;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.OneToMany;
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import java.util.ArrayList;
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import java.util.List;
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import lombok.AccessLevel;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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@Entity
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@Getter
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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public class ChatMessage extends BaseEntity {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@Column(nullable = false, length = 500)
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private String content;
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private long senderId;
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@ManyToOne(fetch = FetchType.LAZY)
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private ChatRoom chatRoom;
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@OneToMany(mappedBy = "chatMessage", cascade = CascadeType.ALL)
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private List<ChatAttachment> chatAttachments = new ArrayList<>();
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}

‎src/main/java/com/example/solidconnection/chat/domain/ChatParticipant.java‎

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package com.example.solidconnection.chat.domain;
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import com.example.solidconnection.common.BaseEntity;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.Table;
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import jakarta.persistence.UniqueConstraint;
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import lombok.AccessLevel;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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@Entity
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@Getter
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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@Table(uniqueConstraints = {
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@UniqueConstraint(
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name = "uk_chat_participant_chat_room_id_site_user_id",
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columnNames = {"chat_room_id", "site_user_id"}
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)
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})
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public class ChatParticipant extends BaseEntity {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@Column(name = "site_user_id")
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private long siteUserId;
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@ManyToOne(fetch = FetchType.LAZY)
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private ChatRoom chatRoom;
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}

‎src/main/java/com/example/solidconnection/chat/domain/ChatReadStatus.java‎

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package com.example.solidconnection.chat.domain;
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import com.example.solidconnection.common.BaseEntity;
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import jakarta.persistence.Column;
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import jakarta.persistence.Entity;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.Table;
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import jakarta.persistence.UniqueConstraint;
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import lombok.AccessLevel;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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@Entity
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@Getter
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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@Table(uniqueConstraints = {
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@UniqueConstraint(
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name = "uk_chat_read_status_chat_room_id_chat_participant_id",
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columnNames = {"chat_room_id", "chat_participant_id"}
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)
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})
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public class ChatReadStatus extends BaseEntity {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@Column(name = "chat_room_id")
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private long chatRoomId;
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@Column(name = "chat_participant_id")
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private long chatParticipantId;
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}

‎src/main/java/com/example/solidconnection/chat/domain/ChatRoom.java‎

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package com.example.solidconnection.chat.domain;
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import com.example.solidconnection.common.BaseEntity;
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import jakarta.persistence.CascadeType;
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import jakarta.persistence.Entity;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.GenerationType;
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import jakarta.persistence.Id;
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import jakarta.persistence.OneToMany;
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import java.util.ArrayList;
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import java.util.List;
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import lombok.AccessLevel;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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@Entity
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@Getter
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@NoArgsConstructor(access = AccessLevel.PROTECTED)
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public class ChatRoom extends BaseEntity {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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private boolean isGroup = false;
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@OneToMany(mappedBy = "chatRoom", cascade = CascadeType.ALL)
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private List<ChatParticipant> chatParticipants = new ArrayList<>();
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@OneToMany(mappedBy = "chatRoom", cascade = CascadeType.ALL)
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private List<ChatMessage> chatMessages = new ArrayList<>();
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}

‎src/main/resources/db/migration/V24__add_chat_related_tables.sql‎

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CREATE TABLE chat_room
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(
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id BIGINT AUTO_INCREMENT PRIMARY KEY,
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is_group BOOLEAN NOT NULL DEFAULT false,
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created_at DATETIME(6) NOT NULL,
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updated_at DATETIME(6) NOT NULL
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);
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CREATE TABLE chat_participant
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(
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id BIGINT AUTO_INCREMENT PRIMARY KEY,
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site_user_id BIGINT NOT NULL,
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chat_room_id BIGINT NOT NULL,
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created_at DATETIME(6) NOT NULL,
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updated_at DATETIME(6) NOT NULL,
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CONSTRAINT FK_CHAT_PARTICIPANT_CHAT_ROOM_ID FOREIGN KEY (chat_room_id) REFERENCES chat_room (id),
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CONSTRAINT FK_CHAT_PARTICIPANT_SITE_USER_ID FOREIGN KEY (site_user_id) REFERENCES site_user (id),
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CONSTRAINT UK_CHAT_PARTICIPANT_CHAT_ROOM_ID_SITE_USER_ID UNIQUE (chat_room_id, site_user_id)
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);
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CREATE TABLE chat_message
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(
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id BIGINT AUTO_INCREMENT PRIMARY KEY,
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content VARCHAR(500) NOT NULL,
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sender_id BIGINT NOT NULL,
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chat_room_id BIGINT NOT NULL,
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created_at DATETIME(6) NOT NULL,
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updated_at DATETIME(6) NOT NULL,
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CONSTRAINT FK_CHAT_MESSAGE_CHAT_ROOM_ID FOREIGN KEY (chat_room_id) REFERENCES chat_room (id),
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CONSTRAINT FK_CHAT_MESSAGE_SENDER_ID FOREIGN KEY (sender_id) REFERENCES chat_participant (id)
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);
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CREATE TABLE chat_attachment
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(
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id BIGINT AUTO_INCREMENT PRIMARY KEY,
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is_image BOOLEAN NOT NULL,
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url VARCHAR(500) NOT NULL,
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thumbnail_url VARCHAR(500),
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chat_message_id BIGINT NOT NULL,
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created_at DATETIME(6) NOT NULL,
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updated_at DATETIME(6) NOT NULL,
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CONSTRAINT FK_CHAT_ATTACHMENT_CHAT_MESSAGE_ID FOREIGN KEY (chat_message_id) REFERENCES chat_message (id)
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);
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CREATE TABLE chat_read_status
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(
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id BIGINT AUTO_INCREMENT PRIMARY KEY,
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chat_room_id BIGINT NOT NULL,
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chat_participant_id BIGINT NOT NULL,
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created_at DATETIME(6) NOT NULL,
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updated_at DATETIME(6) NOT NULL,
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CONSTRAINT FK_CHAT_READ_STATUS_CHAT_ROOM_ID FOREIGN KEY (chat_room_id) REFERENCES chat_room (id),
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CONSTRAINT FK_CHAT_READ_STATUS_CHAT_PARTICIPANT_ID FOREIGN KEY (chat_participant_id) REFERENCES chat_participant (id),
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CONSTRAINT UK_CHAT_READ_STATUS_CHAT_ROOM_ID_CHAT_PARTICIPANT_ID UNIQUE (chat_room_id, chat_participant_id)
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);

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