adjust schema slightly

src/main/java/com/ddf/vodsystem/entities/RefreshToken.java

@@ -2,6 +2,7 @@ package com.ddf.vodsystem.entities;
 
 import jakarta.persistence.*;
 import lombok.Data;
+import org.hibernate.annotations.CreationTimestamp;
 
 import java.time.Instant;
 
@@ -11,19 +12,20 @@ import java.time.Instant;
 public class RefreshToken {
     @Id
     @Column(name = "id", nullable = false, unique = true)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
-    @ManyToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "user_id", nullable = false)
-    private User user;
-
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "family_id", nullable = false)
     private TokenFamily tokenFamily;
 
-    @Column(name = "token_hash", unique = true, nullable = false)
+    @Column(name = "token_hash", unique = true, nullable = false, length = 32)
     private byte[] tokenHash;
 
+    @Column(name = "created_at", nullable = false)
+    @CreationTimestamp
+    private Instant createdAt;
+
     @Column(name = "expires_at", nullable = false)
     private Instant expiresAt;
 

src/main/java/com/ddf/vodsystem/entities/TokenFamily.java

@@ -2,6 +2,7 @@ package com.ddf.vodsystem.entities;
 
 import jakarta.persistence.*;
 import lombok.Data;
+import org.hibernate.annotations.CreationTimestamp;
 
 import java.time.Instant;
 
@@ -11,12 +12,17 @@ import java.time.Instant;
 public class TokenFamily {
     @Id
     @Column(name = "id", nullable = false, unique = true)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", nullable = false)
     private User user;
 
+    @Column(name = "created_at", nullable = false)
+    @CreationTimestamp
+    private Instant createdAt;
+
     @Column(name = "expires_at", nullable = false)
     private Instant expiresAt;
 

src/main/resources/db/migrations/V2__refresh_tokens.sql

@@ -1,11 +1,10 @@
 CREATE TABLE IF NOT EXISTS token_families
 (
-    id BIGSERIAL PRIMARY KEY NOT NULl,
-    user_id BIGSERIAL NOT NULL,
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    user_id BIGINT NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     expires_at TIMESTAMPTZ NOT NULL,
-    revoked_at TIMESTAMPTZ,
-
-    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+    revoked_at TIMESTAMPTZ
 );
 
 CREATE INDEX IF NOT EXISTS idx_token_families_user_id
@@ -13,18 +12,15 @@ CREATE INDEX IF NOT EXISTS idx_token_families_user_id
 
 CREATE TABLE IF NOT EXISTS refresh_tokens
 (
-    id BIGSERIAL PRIMARY KEY NOT NULL,
-    user_id BIGSERIAL NOT NULL,
-    family_id BIGSERIAL NOT NULL,
-    token_hash BYTEA NOT NULL,
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    family_id BIGINT NOT NULL REFERENCES token_families (id) ON DELETE CASCADE,
+    token_hash BYTEA NOT NULL UNIQUE, -- unique automatically creates a B-tree index
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
     expires_at TIMESTAMPTZ NOT NULL,
     used_at TIMESTAMPTZ,
     revoked_at TIMESTAMPTZ,
 
-    CONSTRAINT refresh_tokens_hash_len CHECK (octet_length(token_hash) = 32),
-
-    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
-    FOREIGN KEY (family_id) REFERENCES token_families(id) ON DELETE CASCADE
+    CONSTRAINT refresh_tokens_hash_len CHECK (octet_length(token_hash) = 32)
 );
 
 CREATE INDEX IF NOT EXISTS idx_refresh_tokens_family_id