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go-zero/example/bookstore/rpc/model/bookmodel.go

82 lines
2.3 KiB
Go

package model
import (
"database/sql"
"fmt"
"strings"
"github.com/tal-tech/go-zero/core/stores/cache"
"github.com/tal-tech/go-zero/core/stores/sqlc"
"github.com/tal-tech/go-zero/core/stores/sqlx"
"github.com/tal-tech/go-zero/core/stringx"
"github.com/tal-tech/go-zero/tools/goctl/model/sql/builderx"
)
var (
bookFieldNames = builderx.FieldNames(&Book{})
bookRows = strings.Join(bookFieldNames, ",")
bookRowsExpectAutoSet = strings.Join(stringx.Remove(bookFieldNames, "create_time", "update_time"), ",")
bookRowsWithPlaceHolder = strings.Join(stringx.Remove(bookFieldNames, "book", "create_time", "update_time"), "=?,") + "=?"
cacheBookBookPrefix = "cache#Book#book#"
)
type (
BookModel struct {
sqlc.CachedConn
table string
}
Book struct {
Book string `db:"book"` // book name
Price int64 `db:"price"` // book price
}
)
func NewBookModel(conn sqlx.SqlConn, c cache.CacheConf, table string) *BookModel {
return &BookModel{
CachedConn: sqlc.NewConn(conn, c),
table: table,
}
}
func (m *BookModel) Insert(data Book) (sql.Result, error) {
query := `insert into ` + m.table + ` (` + bookRowsExpectAutoSet + `) values (?, ?)`
return m.ExecNoCache(query, data.Book, data.Price)
}
func (m *BookModel) FindOne(book string) (*Book, error) {
bookBookKey := fmt.Sprintf("%s%v", cacheBookBookPrefix, book)
var resp Book
err := m.QueryRow(&resp, bookBookKey, func(conn sqlx.SqlConn, v interface{}) error {
query := `select ` + bookRows + ` from ` + m.table + ` where book = ? limit 1`
return conn.QueryRow(v, query, book)
})
switch err {
case nil:
return &resp, nil
case sqlc.ErrNotFound:
return nil, ErrNotFound
default:
return nil, err
}
}
func (m *BookModel) Update(data Book) error {
bookBookKey := fmt.Sprintf("%s%v", cacheBookBookPrefix, data.Book)
_, err := m.Exec(func(conn sqlx.SqlConn) (result sql.Result, err error) {
query := `update ` + m.table + ` set ` + bookRowsWithPlaceHolder + ` where book = ?`
return conn.Exec(query, data.Price, data.Book)
}, bookBookKey)
return err
}
func (m *BookModel) Delete(book string) error {
bookBookKey := fmt.Sprintf("%s%v", cacheBookBookPrefix, book)
_, err := m.Exec(func(conn sqlx.SqlConn) (result sql.Result, err error) {
query := `delete from ` + m.table + ` where book = ?`
return conn.Exec(query, book)
}, bookBookKey)
return err
}