db: add more tables

internal/howmuch/adapter/repo/sqlc/models.go

@@ -27,6 +27,17 @@ type Event struct {
 	TotalAmount     sql.NullInt32
 }
 
+type Expense struct {
+	ID        int32
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	Amount    int32
+	Currency  string
+	EventID   int32
+	Name      sql.NullInt32
+	Place     sql.NullInt32
+}
+
 type Participation struct {
 	ID              int32
 	UserID          int32
@@ -36,6 +47,17 @@ type Participation struct {
 	UpdatedAt       time.Time
 }
 
+type Transaction struct {
+	ID        int32
+	ExpenseID int32
+	UserID    int32
+	Amount    int32
+	Currency  string
+	IsIncome  bool
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
 type User struct {
 	ID        int32
 	Email     string

internal/howmuch/model/expense.go

@@ -32,8 +32,12 @@ type ExpenseRequest struct {
 	Detail       ExpenseDetail `json:"detail"`
 }
 
+// {{{ Entity
+
 type ExpenseEntity struct {
 	ID        int
+	CreatedAt time.Time
+	UpdatedAt time.Time
 
 	Amount   int
 	Currency string
@@ -42,9 +46,6 @@ type ExpenseEntity struct {
 	// ExpenseDetail
 	Name  string
 	Place string
-
-	CreatedAt time.Time
-	UpdatedAt time.Time
 }
 
 type ExpenseDetail struct {
@@ -52,8 +53,11 @@ type ExpenseDetail struct {
 	Place string `json:"place"`
 }
 
+// }}}
 type Expense struct {
 	ID        int
+	CreatedAt time.Time
+	UpdatedAt time.Time
 
 	Amount Money
 
@@ -65,7 +69,4 @@ type Expense struct {
 
 	EventID int
 	Detail  ExpenseDetail
-
-	CreatedAt time.Time
-	UpdatedAt time.Time
 }

internal/howmuch/model/transaction.go

@@ -24,18 +24,25 @@ package model
 
 import "time"
 
+// {{{ Entity
+
 type TransactionEntity Transaction
 
-// Transaction is the association between Expenses and Users
+// }}}
+// {{{ Domain object
+
 type Transaction struct {
 	ID int
 
-	ExpenseID Expense
+	ExpenseID int
 	UserID    int
 	Amount    int
 	Currency  string
-	IsIncome  bool
+	IsIncome  bool // To note that the direction of the money (payment or income)
 
 	CreatedAt time.Time
 	UpdatedAt time.Time
 }
+
+// }}}
+// Transaction is the association between Expenses and Users

migrations/20241019110734_create_transaction_table.postgres.down.sql

@@ -0,0 +1,2 @@
+CREATE TABLE "transaction";
+

migrations/20241019110734_create_transaction_table.postgres.up.sql

@@ -0,0 +1,14 @@
+CREATE TABLE "transaction" (
+  "id" serial NOT NULL,
+  PRIMARY KEY ("id"),
+  "expense_id" integer NOT NULL,
+  "user_id" integer NOT NULL,
+  "amount" integer NOT NULL,
+  "currency" character varying(255) NOT NULL,
+  "is_income" boolean NOT NULL DEFAULT FALSE,
+  "created_at" date NOT NULL,
+  "updated_at" date NOT NULL
+);
+
+ALTER TABLE "transaction"
+ADD FOREIGN KEY ("user_id") REFERENCES "user" ("id") ON DELETE CASCADE ON UPDATE CASCADE;

migrations/20241019112255_create_expense_table.postgres.down.sql

@@ -0,0 +1 @@
+DROP TABLE "expense";

migrations/20241019112255_create_expense_table.postgres.up.sql

@@ -0,0 +1,14 @@
+CREATE TABLE "expense" (
+  "id" serial NOT NULL,
+  PRIMARY KEY ("id"),
+  "created_at" date NOT NULL,
+  "updated_at" date NOT NULL,
+  "amount" integer NOT NULL,
+  "currency" character varying NOT NULL,
+  "event_id" integer NOT NULL,
+  "name" integer NULL,
+  "place" integer NULL
+);
+
+ALTER TABLE "expense"
+ADD FOREIGN KEY ("event_id") REFERENCES "event" ("id") ON DELETE CASCADE ON UPDATE CASCADE

migrations/20241019112421_fk_transaction_expense.postgres.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "transaction"
+ADD FOREIGN KEY ("expense_id") REFERENCES "expense" ("id") ON DELETE CASCADE ON UPDATE CASCADE