Add a new API for getting one book entity

README.md

@@ -74,11 +74,12 @@ There are the following services in the book management.
 
 |Service Name|HTTP Method|URL|Parameter|Summary|
 |:---|:---:|:---|:---|:---|
-|List Service|GET|``/api/book/list``|Page|Get a list of books.|
+|Get Service|GET|``/api/book/get?id=[BOOK_ID]``|Book ID|Get a book data.|
+|List Service|GET|``/api/book/list?page=[PAGE_NUMBER]&size=[PAGE_SIZE]``|Page|Get a list of books.|
 |Regist Service|POST|``/api/book/new``|Book|Regist a book data.|
 |Edit Service|POST|``/api/book/edit``|Book|Edit a book data.|
 |Delete Service|POST|``/api/book/delete``|Book|Delete a book data.|
-|Search Title Service|GET|``/api/book/search``|Keyword, Page|Search a title with  the specified keyword.|
+|Search Title Service|GET|``/api/book/search?query=[KEYWORD]&page=[PAGE_NUMBER]&size=[PAGE_SIZE]``|Keyword, Page|Search a title with  the specified keyword.|
 
 ### Account Management
 There are the following services in the Account management.

controller/api_const.go

@@ -5,6 +5,8 @@ const (
 	API = "/api"
 	// APIBook represents the group of book management API.
 	APIBook = API + "/book"
+	// APIBookGet represents the API to get one book.
+	APIBookGet = APIBook + "/get"
 	// APIBookList represents the API to get book's list.
 	APIBookList = APIBook + "/list"
 	// APIBookSearch represents the API to search book's list.

controller/book.go

@@ -21,6 +21,13 @@ func NewBookController(context mycontext.Context) *BookController {
 	return &BookController{context: context, service: service.NewBookService(context)}
 }
 
+// GetBook returns one record matched book's id.
+func (controller *BookController) GetBook(c echo.Context) error {
+	id, _ := strconv.Atoi(c.QueryParam("id"))
+
+	return c.JSON(http.StatusOK, controller.service.FindByID(uint(id)))
+}
+
 // GetBookList returns the list of all books.
 func (controller *BookController) GetBookList(c echo.Context) error {
 	page, _ := strconv.Atoi(c.QueryParam("page"))

model/book.go

@@ -82,7 +82,7 @@ func (b *Book) FindAllByPage(rep repository.Repository, page int, size int) (*Pa
 	var rec RecordBook
 	var rows *sql.Rows
 	var err error
-	if rows, err = rep.Raw(selectBook+" limit ? offset ? ", size, page*size).Rows(); err != nil {
+	if rows, err = rep.Raw(createSQL(selectBook, page, size), size, page*size).Rows(); err != nil {
 		return nil, err
 	}
 	for rows.Next() {
@@ -104,7 +104,7 @@ func (b *Book) FindByTitle(rep repository.Repository, title string, page int, si
 	var rec RecordBook
 	var rows *sql.Rows
 	var err error
-	if rows, err = rep.Raw(selectBook+" where title like ? limit ? offset ? ", "%"+title+"%", size, page*size).Rows(); err != nil {
+	if rows, err = rep.Raw(createSQL(selectBook+" where title like ? ", page, size), "%"+title+"%", size, page*size).Rows(); err != nil {
 		return nil, err
 	}
 	for rows.Next() {
@@ -119,6 +119,13 @@ func (b *Book) FindByTitle(rep repository.Repository, title string, page int, si
 	return p, nil
 }
 
+func createSQL(sql string, page int, size int) string {
+	if page > 0 && size > 0 {
+		sql += " limit ? offset ? "
+	}
+	return sql
+}
+
 func createPage(books *[]Book, page int, size int) *Page {
 	p := NewPage()
 	p.Page = page

router/router.go

@@ -42,6 +42,7 @@ func Init(e *echo.Echo, context mycontext.Context) {
 	account := controller.NewAccountController(context)
 	health := controller.NewHealthController(context)
 
+	e.GET(controller.APIBookGet, func(c echo.Context) error { return book.GetBook(c) })
 	e.GET(controller.APIBookList, func(c echo.Context) error { return book.GetBookList(c) })
 	e.GET(controller.APIBookSearch, func(c echo.Context) error { return book.GetBookSearch(c) })
 	e.POST(controller.APIBookRegist, func(c echo.Context) error { return book.PostBookRegist(c) })

service/book.go

@@ -17,6 +17,18 @@ func NewBookService(context mycontext.Context) *BookService {
 	return &BookService{context: context}
 }
 
+// FindByID returns one record matched book's id.
+func (b *BookService) FindByID(id uint) *model.Book {
+	rep := b.context.GetRepository()
+	book := model.Book{}
+	result, err := book.FindByID(rep, id)
+	if err != nil {
+		b.context.GetLogger().GetZapLogger().Errorf(err.Error())
+		return nil
+	}
+	return result
+}
+
 // FindAllBooks returns the list of all books.
 func (b *BookService) FindAllBooks() *[]model.Book {
 	rep := b.context.GetRepository()