chore: upgrade Go version to 1.26

Makefile

@@ -186,6 +186,9 @@ format: ## コード整形
 go-mod-tidy:
 	docker compose run --rm api go mod tidy
 
+go-fix:
+	docker compose run --rm api sh -c "cd /app && go fix ./..."
+
 # Wireコードを生成
 wire-gen:
 	docker compose run --rm api sh -c "cd /app/internals/di && go run github.com/google/wire/cmd/wire gen"

api/dev.Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25.5-alpine
+FROM golang:1.26-alpine3.23
 
 RUN apk add --no-cache bash tzdata
 

api/externals/handler/wire.go

@@ -1,5 +1,4 @@
 //go:build wireinject
-// +build wireinject
 
 package handler
 

api/externals/repository/division_repository.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"strings"
 
 	"github.com/NUTFes/FinanSu/api/drivers/db"
 	"github.com/NUTFes/FinanSu/api/externals/repository/abstract"
@@ -40,7 +41,7 @@ func (dr *divisionRepository) AllByPeriodAndFinancialRecord(
 ) (*sql.Rows, error) {
 
 	var conditions []string
-	var args []interface{}
+	var args []any
 
 	if year != "" {
 		conditions = append(conditions, "years.year = ?")
@@ -213,10 +214,10 @@ type Division = generated.Division
 
 // NOTE: getの共通部分抜き出し
 func makeSelectDivisionsSQL(conditions []string) string {
-	condition := ""
+	var condition strings.Builder
 	if len(conditions) > 0 {
 		for _, c := range conditions {
-			condition += fmt.Sprintf(" AND %s", c)
+			condition.WriteString(fmt.Sprintf(" AND %s", c))
 		}
 	}
 
@@ -254,7 +255,7 @@ func makeSelectDivisionsSQL(conditions []string) string {
 		WHERE 1=1
 		%s
 		ORDER BY divisions.id DESC
-	`, condition)
+	`, condition.String())
 }
 
 var selectDivisionOptionsQuery = dialect.From("divisions").

api/externals/repository/festival_item_repository.go

@@ -44,7 +44,7 @@ func (fir *festivalItemRepository) AllByPeriodAndDivision(
 	divisionId string,
 ) (*sql.Rows, error) {
 	var conditions []string
-	var args []interface{}
+	var args []any
 
 	if divisionId != "" {
 		conditions = append(conditions, "divisions.id = ?")

api/externals/repository/financial_record_repository.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"strings"
 
 	"github.com/NUTFes/FinanSu/api/drivers/db"
 	"github.com/NUTFes/FinanSu/api/externals/repository/abstract"
@@ -192,10 +193,10 @@ var selectFestivalItemGroupSQL = `
 `
 
 func makeSelectFinancialRecordDetailsSQL(conditions []string) string {
-	condition := ""
+	var condition strings.Builder
 	if len(conditions) > 0 {
 		for _, c := range conditions {
-			condition += fmt.Sprintf(" AND %s", c)
+			condition.WriteString(fmt.Sprintf(" AND %s", c))
 		}
 	}
 	return fmt.Sprintf(`
@@ -229,7 +230,7 @@ func makeSelectFinancialRecordDetailsSQL(conditions []string) string {
 	GROUP BY
 		financial_records.id
 	ORDER BY
-		financial_records.id`, selectFestivalItemGroupSQL, condition)
+		financial_records.id`, selectFestivalItemGroupSQL, condition.String())
 }
 
 // CSV用の予算・部門を取得するクエリ

api/externals/repository/purchase_order_repository.go

@@ -5,6 +5,7 @@ import (
 	"database/sql"
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/NUTFes/FinanSu/api/drivers/db"
 	"github.com/NUTFes/FinanSu/api/externals/repository/abstract"
@@ -61,7 +62,7 @@ func (por *purchaseOrderRepository) Create(
 	query := `
 		INSERT INTO
 			purchase_orders (deadline, user_id, expense_id, finance_check)
-		VALUES ('` + deadLine + "'," + userId + "," + expenseId + "," +financeCheck + ")"
+		VALUES ('` + deadLine + "'," + userId + "," + expenseId + "," + financeCheck + ")"
 	return por.crud.UpdateDB(c, query)
 }
 
@@ -196,29 +197,30 @@ func (p *purchaseOrderRepository) AllUserInfoByYear(c context.Context, year stri
 }
 
 func (p *purchaseOrderRepository) NotifySlack(c context.Context, purchaseOrder domain.PurchaseOrder, purchaseItems []domain.PurchaseItem, user domain.User, bureau domain.Bureau, expense domain.Expense) error {
-		token := os.Getenv("BOT_USER_OAUTH_TOKEN")
-		channelName := os.Getenv("CHANNEL_NAME")
+	token := os.Getenv("BOT_USER_OAUTH_TOKEN")
+	channelName := os.Getenv("CHANNEL_NAME")
 
-		//メッセージ作成
-		sendMessage := "購入申請を受け付けました \n"
-		sendMessage += fmt.Sprintf("局・団体： %s", expense.Name) + " \n"
-		sendMessage += fmt.Sprintf("申請者： %s  %s", bureau.Name, user.Name) + " \n"
-		sendMessage += "購入物品 \n"
-		//合計金額
-		sum := 0
-		//購入物品
-		for _, item := range purchaseItems{
-			sum += item.Price*item.Quantity
-			sendMessage += fmt.Sprintf("・%s  %d円  %d個", item.Item, item.Price, item.Quantity) + " \n"
-		}
-		sendMessage += fmt.Sprintf("合計  %d円", sum)
-		client := slack.New(token)
+	//メッセージ作成
+	var sendMessage strings.Builder
+	sendMessage.WriteString("購入申請を受け付けました \n")
+	sendMessage.WriteString(fmt.Sprintf("局・団体： %s", expense.Name) + " \n")
+	sendMessage.WriteString(fmt.Sprintf("申請者： %s  %s", bureau.Name, user.Name) + " \n")
+	sendMessage.WriteString("購入物品 \n")
+	//合計金額
+	sum := 0
+	//購入物品
+	for _, item := range purchaseItems {
+		sum += item.Price * item.Quantity
+		sendMessage.WriteString(fmt.Sprintf("・%s  %d円  %d個", item.Item, item.Price, item.Quantity) + " \n")
+	}
+	sendMessage.WriteString(fmt.Sprintf("合計  %d円", sum))
+	client := slack.New(token)
 
-		_, _, err := client.PostMessage(channelName, slack.MsgOptionText(sendMessage, false))
-		if err != nil {
-			panic(err)
-		}
-		return err
+	_, _, err := client.PostMessage(channelName, slack.MsgOptionText(sendMessage.String(), false))
+	if err != nil {
+		panic(err)
+	}
+	return err
 }
 
 func (p *purchaseOrderRepository) AllUnregisteredUserInfoByYear(c context.Context, year string) (*sql.Rows, error) {
@@ -247,7 +249,7 @@ func (p *purchaseOrderRepository) AllUnregisteredUserInfoByYear(c context.Contex
 		ON
 			orders.id = reports.purchase_order_id
 		WHERE
-			years.year = `+ year +`
+			years.year = ` + year + `
 		AND
 			reports.purchase_order_id IS NULL
 		ORDER BY

api/externals/repository/teacher_repository.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"strconv"
+	"strings"
 
 	"github.com/NUTFes/FinanSu/api/drivers/db"
 	"github.com/NUTFes/FinanSu/api/externals/repository/abstract"
@@ -121,17 +122,18 @@ func (t *teacherRepository) FindLatestRecord(c context.Context) (*sql.Row, error
 
 // 複数削除
 func (t *teacherRepository) MultiDestroy(c context.Context, ids []int) error {
-	query := "UPDATE teachers SET is_deleted = TRUE WHERE "
+	var query strings.Builder
+	query.WriteString("UPDATE teachers SET is_deleted = TRUE WHERE ")
 	for index, id := range ids {
-		query += "id = " + strconv.Itoa(id)
+		query.WriteString("id = " + strconv.Itoa(id))
 
-		if(index != len(ids)-1){
-			query += " OR "
+		if index != len(ids)-1 {
+			query.WriteString(" OR ")
 		}
 
 	}
 
-	err := t.crud.UpdateDB(c, query)
+	err := t.crud.UpdateDB(c, query.String())
 	if err != nil {
 		return err
 	}

api/externals/repository/user_repository.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"strconv"
+	"strings"
 
 	"github.com/NUTFes/FinanSu/api/drivers/db"
 	"github.com/NUTFes/FinanSu/api/externals/repository/abstract"
@@ -80,25 +81,27 @@ func (ur *userRepository) Destroy(c context.Context, id string) error {
 
 // 複数削除
 func (ur *userRepository) MultiDestroy(c context.Context, ids []int) error {
-	query := "UPDATE users SET is_deleted = TRUE WHERE "
-	query2 := "UPDATE mail_auth SET email = NULL WHERE "
+	var query strings.Builder
+	query.WriteString("UPDATE users SET is_deleted = TRUE WHERE ")
+	var query2 strings.Builder
+	query2.WriteString("UPDATE mail_auth SET email = NULL WHERE ")
 	for index, id := range ids {
-		query += "id = " + strconv.Itoa(id)
-		query2 += "user_id = " + strconv.Itoa(id)
+		query.WriteString("id = " + strconv.Itoa(id))
+		query2.WriteString("user_id = " + strconv.Itoa(id))
 
 		if index != len(ids)-1 {
-			query += " OR "
-			query2 += " OR "
+			query.WriteString(" OR ")
+			query2.WriteString(" OR ")
 		}
 
 	}
 
-	err := ur.crud.UpdateDB(c, query)
+	err := ur.crud.UpdateDB(c, query.String())
 	if err != nil {
 		return err
 	}
 
-	err = ur.crud.UpdateDB(c, query2)
+	err = ur.crud.UpdateDB(c, query2.String())
 
 	return err
 }

api/externals/repository/wire.go

@@ -1,5 +1,4 @@
 //go:build wireinject
-// +build wireinject
 
 package repository
 

api/go.mod

@@ -1,8 +1,6 @@
 module github.com/NUTFes/FinanSu/api
 
-go 1.23.0
-
-toolchain go1.24.1
+go 1.26.0
 
 require (
 	github.com/doug-martin/goqu/v9 v9.19.0

api/internals/di/wire.go

@@ -1,5 +1,4 @@
 //go:build wireinject
-// +build wireinject
 
 package di
 

api/internals/usecase/mail_auth_usecase.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/rand"
 	"strconv"
+	"strings"
 
 	rep "github.com/NUTFes/FinanSu/api/externals/repository"
 	"github.com/NUTFes/FinanSu/api/internals/domain"
@@ -128,10 +129,10 @@ func _makeRandomStr(digit uint32) (string, error) {
 	}
 
 	// letters からランダムに取り出して文字列を生成
-	var result string
+	var result strings.Builder
 	for _, v := range b {
 		// index が letters の長さに収まるように調整
-		result += string(letters[int(v)%len(letters)])
+		result.WriteString(string(letters[int(v)%len(letters)]))
 	}
-	return result, nil
+	return result.String(), nil
 }

api/internals/usecase/sponsor_usecase.go

@@ -5,6 +5,7 @@ import (
 	"encoding/csv"
 	"fmt"
 	"io"
+	"slices"
 	"strings"
 	"unicode/utf8"
 
@@ -211,10 +212,8 @@ func (s *sponsorUseCase) CreateSponsorsByCsv(c context.Context, csvFile io.Reade
 			continue
 		}
 
-		for j := range record {
-			if isEmpty(record[j]) {
-				return nil, fmt.Errorf("空のレコードがあります。")
-			}
+		if slices.ContainsFunc(record, isEmpty) {
+			return nil, fmt.Errorf("空のレコードがあります。")
 		}
 
 		sponsor := domain.Sponsor{

api/internals/usecase/wire.go

@@ -1,5 +1,4 @@
 //go:build wireinject
-// +build wireinject
 
 package usecase
 

prod.api.Dockerfile

@@ -1,5 +1,5 @@
 # Build用 コンテナ
-FROM golang:1.25.5-alpine AS builder
+FROM golang:1.26-alpine3.23 AS builder
 WORKDIR /app
 COPY ./api /app
 ENV CGO_ENABLED=0 \