/
model_save.go
201 lines (196 loc) · 5.99 KB
/
model_save.go
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package gomodel
import (
"github.com/dimonrus/gosql"
"github.com/lib/pq"
"reflect"
)
// GetSaveSQL prepare save query
// it can be insert or update or upsert
// some popular scenario was implemented. not all
func GetSaveSQL(model IModel) gosql.ISQL {
ve := reflect.ValueOf(model)
te := reflect.TypeOf(model).Elem()
if ve.IsNil() {
return nil
}
ve = ve.Elem()
var columnsInsert = gosql.NewExpression()
var columnsUpdate = gosql.NewExpression()
var conflictObject = gosql.NewExpression()
var returning = gosql.NewExpression()
var condition = gosql.NewSqlCondition(gosql.ConditionOperatorAnd)
var conflict = gosql.NewConflict().Action(gosql.ConflictActionUpdate)
var insert, update, upsert, hasPrimaryKey bool
var result gosql.ISQL
var tField ModelFiledTag
for i := 0; i < ve.NumField(); i++ {
field := ve.Field(i)
tField.Clear()
ParseModelFiledTag(te.Field(i).Tag.Get("db"), &tField)
if tField.IsPrimaryKey {
hasPrimaryKey = true
if !field.IsNil() {
if tField.IsSequence {
update = true
condition.AddExpression(tField.Column+" = ?", field.Interface())
} else {
upsert = true
if field.Kind() == reflect.Slice || field.Kind() == reflect.Array {
columnsInsert.Append(tField.Column, pq.Array(field.Interface()))
} else {
columnsInsert.Append(tField.Column, field.Interface())
}
conflictObject.Add(tField.Column)
}
} else {
if tField.IsSequence {
insert = true
returning.Append(tField.Column, field.Addr().Interface())
} else {
upsert = true
if field.Kind() == reflect.Slice || field.Kind() == reflect.Array {
columnsInsert.Append(tField.Column, pq.Array(field.Interface()))
} else {
columnsInsert.Append(tField.Column, field.Interface())
}
conflictObject.Add(tField.Column)
}
}
} else if tField.IsUnique && !hasPrimaryKey {
if !field.IsNil() {
if tField.IsSequence {
update = true
condition.AddExpression(tField.Column+" = ?", field.Interface())
} else if !insert && !update {
upsert = true
if field.Kind() == reflect.Slice || field.Kind() == reflect.Array {
columnsInsert.Append(tField.Column, pq.Array(field.Interface()))
} else {
columnsInsert.Append(tField.Column, field.Interface())
}
conflictObject.Add(tField.Column)
}
} else {
if tField.IsSequence {
insert = true
returning.Append(tField.Column, field.Addr().Interface())
} else if !insert && !update {
upsert = true
if field.Kind() == reflect.Slice || field.Kind() == reflect.Array {
columnsInsert.Append(tField.Column, pq.Array(field.Interface()))
} else {
columnsInsert.Append(tField.Column, field.Interface())
}
conflictObject.Add(tField.Column)
}
}
} else if !tField.IsIgnored {
if field.Kind() == reflect.Slice || field.Kind() == reflect.Array {
columnsInsert.Append(tField.Column, pq.Array(field.Interface()))
columnsUpdate.Append(tField.Column+" = ?", pq.Array(field.Interface()))
} else {
if tField.IsCreatedAt {
returning.Append(tField.Column, field.Addr().Interface())
} else if tField.IsUpdatedAt {
columnsUpdate.Append(tField.Column + " = NOW()")
returning.Append(tField.Column, field.Addr().Interface())
} else if tField.IsDeletedAt {
returning.Append(tField.Column, field.Addr().Interface())
} else if tField.IsSequence {
returning.Append(tField.Column, field.Addr().Interface())
} else {
columnsInsert.Append(tField.Column, field.Interface())
columnsUpdate.Append(tField.Column+" = ?", field.Interface())
}
}
}
}
if update {
uQuery := gosql.NewUpdate()
if condition != nil {
uQuery.Where().Replace(condition)
}
uQuery.Table(model.Table())
if columnsUpdate.Len() > 0 {
uQuery.Set().Append(columnsUpdate.String(", "), columnsUpdate.GetArguments()...)
}
if returning.Len() > 0 {
uQuery.Returning().Append(returning.String(", "), returning.GetArguments()...)
}
result = uQuery
} else if insert {
insertQuery := gosql.NewInsert()
insertQuery.Into(model.Table())
insertQuery.Columns().Add(columnsInsert.Split()...)
insertQuery.Columns().Arg(columnsInsert.GetArguments()...)
if returning.Len() > 0 {
insertQuery.Returning().Append(returning.String(", "), returning.GetArguments()...)
}
result = insertQuery
} else if upsert {
upsertQuery := gosql.NewInsert()
upsertQuery.Into(model.Table())
upsertQuery.Columns().Add(columnsInsert.Split()...)
upsertQuery.Columns().Arg(columnsInsert.GetArguments()...)
if returning.Len() > 0 {
upsertQuery.Returning().Append(returning.String(", "), returning.GetArguments()...)
}
if columnsUpdate.Len() > 0 {
conflict.Set().Add(columnsUpdate.Split()...)
conflict.Set().Arg(columnsUpdate.GetArguments()...)
}
conflict.Object(conflictObject.String(", "))
upsertQuery.SetConflict(*conflict)
result = upsertQuery
}
return result
}
// getSaveScenario check model for save scenario
// Helper method to understand how to get right save scenario
func getSaveScenario(model IModel) (insert, update, upsert bool) {
if model == nil {
return
}
ve := reflect.ValueOf(model).Elem()
te := reflect.TypeOf(model).Elem()
var hasPrimaryKey bool
var tField ModelFiledTag
for i := 0; i < ve.NumField(); i++ {
field := ve.Field(i)
ParseModelFiledTag(te.Field(i).Tag.Get("db"), &tField)
if tField.IsPrimaryKey {
hasPrimaryKey = true
if !field.IsNil() {
if tField.IsSequence {
update = true
} else {
upsert = true
}
} else {
if tField.IsSequence {
insert = true
} else {
// conflict situation. Has primary, no value, no seq
upsert = true
}
}
} else if tField.IsUnique && !hasPrimaryKey {
if !field.IsNil() {
if tField.IsSequence {
update = true
} else if !insert && !update {
upsert = true
}
} else {
if tField.IsSequence {
insert = true
} else if !insert && !update {
// conflict situation. Has unique, no value, no seq
upsert = true
}
}
}
tField.Clear()
}
return
}