/
specification.go
298 lines (284 loc) · 7.75 KB
/
specification.go
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package criteria
import (
"github.com/cloudintheking/gohipster-criteria/utils"
"gorm.io/gorm"
"strconv"
"strings"
"time"
)
type CommonDbOperation struct {
Selects []string //查询字段
Preloads map[string]interface{} //预加载字段
Orders []string //排序
Groups []string //分组
Havings map[string]interface{} //分组筛选
Limit *int //限制大小
}
/**
* @Description: 封装其他操作
* @param db
* @param operation
* @return *gorm.DB
*/
func CreateCommonOperationDb(db *gorm.DB, operation *CommonDbOperation) *gorm.DB {
if operation != nil {
if operation.Preloads != nil {
for pk, pv := range operation.Preloads {
if pv != nil {
switch v := pv.(type) {
case func(pdb *gorm.DB) *gorm.DB: //函数处理
db = db.Preload(pk, v)
case []interface{}: //条件处理
db = db.Preload(pk, v...)
}
} else {
db = db.Preload(pk)
}
}
}
if operation.Selects != nil {
db = db.Select(operation.Selects)
}
if operation.Orders != nil {
for _, order := range operation.Orders {
db = db.Order(order)
}
}
if operation.Limit != nil {
db = db.Limit(*operation.Limit)
}
if operation.Groups != nil {
for _, group := range operation.Groups {
db = db.Group(group)
}
}
if operation.Havings != nil {
for hk, hv := range operation.Havings {
db = db.Having(hk, utils.Interface2Slice(hv)...)
}
}
}
return db
}
/**
* @Description: 创建整数从句
* @param tx db操作
* @param name 查询参数名
* @param criteria 查询条件
*/
type ClauseConstantsEnum struct {
Regexp string
Contains string
Equals string
NotEquals string
Lt string
Lte string
Gt string
Gte string
In string
}
var ClauseConstants = ClauseConstantsEnum{
Regexp: "regexp",
Contains: "like",
Equals: "=",
NotEquals: "<>",
Lt: "<",
Lte: "<=",
Gt: ">",
Gte: ">=",
In: "in",
}
/**
* @Description: 创建条件从句
* @param db
* @param name
* @param criteria
* @return tx
*/
func BuildSpecification(db *gorm.DB, name string, criteria interface{}) (tx *gorm.DB) {
tx = db
switch v := criteria.(type) {
case IntFilter:
tx = buildIntSpecification(tx, name, v)
case StringFilter:
tx = buildStringSpecification(tx, name, v)
case FloatFilter:
tx = buildFloatSpecification(tx, name, v)
case BoolFilter:
tx = buildBoolSpecification(tx, name, v)
}
return tx
}
/**
* @Description: 创建整数型从句
* @param tx
* @param name
* @param criteria
*/
func buildIntSpecification(db *gorm.DB, name string, criteria IntFilter) (tx *gorm.DB) {
tx = db
var query string
if criteria.Equals != nil {
query = strings.Join([]string{name, ClauseConstants.Equals, "?"}, " ")
tx = db.Where(query, criteria.Equals)
}
if criteria.NotEquals != nil {
query = strings.Join([]string{name, ClauseConstants.NotEquals, "?"}, " ")
tx = db.Where(query, criteria.NotEquals)
}
if criteria.Lt != nil {
query = strings.Join([]string{name, ClauseConstants.Lt, "?"}, " ")
tx = db.Where(query, criteria.Lt)
}
if criteria.Lte != nil {
query = strings.Join([]string{name, ClauseConstants.Lte, "?"}, " ")
tx = db.Where(query, criteria.Lte)
}
if criteria.Gt != nil {
query = strings.Join([]string{name, ClauseConstants.Gt, "?"}, " ")
tx = db.Where(query, criteria.Gt)
}
if criteria.Gte != nil {
query = strings.Join([]string{name, ClauseConstants.Gte, "?"}, " ")
tx = db.Where(query, criteria.Gte)
}
if criteria.In != nil {
query = strings.Join([]string{name, ClauseConstants.In, "(?)"}, " ")
inStrSlice := strings.Split(*criteria.In, ",")
var inIntSlice []int64
for _, inStr := range inStrSlice {
inInt, _ := strconv.ParseInt(inStr, 10, 64)
inIntSlice = append(inIntSlice, inInt)
}
tx = db.Where(query, inIntSlice)
}
return
}
/**
* @Description: 创建浮点型从句
* @param tx
* @param name
* @param criteria
*/
func buildFloatSpecification(db *gorm.DB, name string, criteria FloatFilter) (tx *gorm.DB) {
tx = db
var query string
if criteria.Equals != nil {
query = strings.Join([]string{name, ClauseConstants.Equals, "?"}, " ")
tx = db.Where(query, criteria.Equals)
}
if criteria.NotEquals != nil {
query = strings.Join([]string{name, ClauseConstants.NotEquals, "?"}, " ")
tx = db.Where(query, criteria.NotEquals)
}
if criteria.Lt != nil {
query = strings.Join([]string{name, ClauseConstants.Lt, "?"}, " ")
tx = db.Where(query, criteria.Lt)
}
if criteria.Lte != nil {
query = strings.Join([]string{name, ClauseConstants.Lte, "?"}, " ")
tx = db.Where(query, criteria.Lte)
}
if criteria.Gt != nil {
query = strings.Join([]string{name, ClauseConstants.Gt, "?"}, " ")
tx = db.Where(query, criteria.Gt)
}
if criteria.Gte != nil {
query = strings.Join([]string{name, ClauseConstants.Gte, "?"}, " ")
tx = db.Where(query, criteria.Gte)
}
if criteria.In != nil {
query = strings.Join([]string{name, ClauseConstants.In, "(?)"}, " ")
inStrSlice := strings.Split(*criteria.In, ",")
var inFloatSlice []float64
for _, inStr := range inStrSlice {
inInt, _ := strconv.ParseFloat(inStr, 64)
inFloatSlice = append(inFloatSlice, inInt)
}
tx = db.Where(query, inFloatSlice)
}
return
}
/**
* @Description: 创建字符串型从句
* @param tx
* @param name
* @param criteria
*/
func buildStringSpecification(db *gorm.DB, name string, criteria StringFilter) (tx *gorm.DB) {
tx = db
var query string
if criteria.Equals != nil {
query = strings.Join([]string{name, ClauseConstants.Equals, "?"}, " ")
tx = db.Where(query, criteria.Equals)
}
if criteria.NotEquals != nil {
query = strings.Join([]string{name, ClauseConstants.NotEquals, "?"}, " ")
tx = db.Where(query, criteria.NotEquals)
}
if criteria.Contains != nil {
query = strings.Join([]string{name, ClauseConstants.Contains, "?"}, " ")
tx = db.Where(query, "%"+*criteria.Contains+"%")
}
if criteria.Regexp != nil {
query = strings.Join([]string{name, ClauseConstants.Regexp, "?"}, " ")
tx = db.Where(query, criteria.Contains)
}
if criteria.In != nil {
query = strings.Join([]string{name, ClauseConstants.In, "(?)"}, " ")
tx = db.Where(query, strings.Split(*criteria.In, ","))
}
return
}
/**
* @Description: 创建时间型从句
* @param tx
* @param name
* @param criteria
*/
func buildTimeSpecification(db *gorm.DB, name string, criteria TimeFilter) (tx *gorm.DB) {
tx = db
var query string
var timeV time.Time
var err error
if criteria.Lt != nil {
timeV, err = time.ParseInLocation("2006-01-02 15:04:05", *criteria.Lt, time.Local)
query = strings.Join([]string{name, ClauseConstants.Lt, "?"}, " ")
tx = db.Where(query, timeV)
}
if criteria.Lte != nil {
timeV, err = time.ParseInLocation("2006-01-02 15:04:05", *criteria.Lte, time.Local)
query = strings.Join([]string{name, ClauseConstants.Lte, "?"}, " ")
tx = db.Where(query, timeV)
}
if criteria.Gt != nil {
timeV, err = time.ParseInLocation("2006-01-02 15:04:05", *criteria.Gt, time.Local)
query = strings.Join([]string{name, ClauseConstants.Gt, "?"}, " ")
tx = db.Where(query, timeV)
}
if criteria.Gte != nil {
timeV, err = time.ParseInLocation("2006-01-02 15:04:05", *criteria.Gte, time.Local)
query = strings.Join([]string{name, ClauseConstants.Gte, "?"}, " ")
tx = db.Where(query, timeV)
}
if err != nil {
panic("时间" + *criteria.Lt + "格式转换异常")
}
return
}
/**
* @Description: 创建布尔型条件从句
* @param tx
* @param name
* @param criteria
* @return *gorm.DB
*/
func buildBoolSpecification(db *gorm.DB, name string, criteria BoolFilter) (tx *gorm.DB) {
tx = db
var query string
if criteria.Equals != nil {
query = strings.Join([]string{name, ClauseConstants.Equals, "?"}, "")
tx = db.Where(query, criteria.Equals)
}
return
}