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page.go
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page.go
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//go:build go1.18
package clause
import (
"github.com/hopeio/cherry/utils/types/request"
"gorm.io/gorm"
"gorm.io/gorm/clause"
)
type PageSortReq request.PageSortReq
func (req *PageSortReq) Clause() []clause.Expression {
if req.PageNo == 0 && req.PageSize == 0 {
return nil
}
if req.SortReq == nil || req.SortReq.SortField == "" {
return []clause.Expression{Page(req.PageNo, req.PageSize)}
}
return []clause.Expression{Sort(req.SortField, req.SortType), Page(req.PageNo, req.PageSize)}
}
func List[T any, O request.Ordered](db *gorm.DB, req *request.ListReq[O]) ([]T, error) {
var models []T
clauses := ListClause(req)
if len(clauses) > 0 {
db = db.Clauses(clauses...)
}
err := db.Find(&models).Error
if err != nil {
return nil, err
}
return models, nil
}
func ListClause[O request.Ordered](req *request.ListReq[O]) []clause.Expression {
return (*ListReq[O])(req).Clause()
}
type ListReq[T request.Ordered] request.ListReq[T]
func (req *ListReq[O]) Clause() []clause.Expression {
pqc := (*PageSortReq)(&req.PageSortReq).Clause()
rqc := (*RangeReq[O])(req.RangeReq).Clause()
if pqc != nil && rqc != nil {
return append((*PageSortReq)(&req.PageSortReq).Clause(), (*RangeReq[O])(req.RangeReq).Clause())
}
if rqc == nil {
return pqc
}
if rqc != nil {
return []clause.Expression{rqc}
}
return nil
}