477 lines
12 KiB
Go
477 lines
12 KiB
Go
package boil
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import (
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"database/sql"
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"fmt"
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"math"
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"math/rand"
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"reflect"
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"sort"
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"time"
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"github.com/nullbio/sqlboiler/strmangle"
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"gopkg.in/nullbio/null.v4"
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)
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var (
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typeNullFloat32 = reflect.TypeOf(null.Float32{})
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typeNullFloat64 = reflect.TypeOf(null.Float64{})
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typeNullInt = reflect.TypeOf(null.Int{})
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typeNullInt8 = reflect.TypeOf(null.Int8{})
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typeNullInt16 = reflect.TypeOf(null.Int16{})
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typeNullInt32 = reflect.TypeOf(null.Int32{})
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typeNullInt64 = reflect.TypeOf(null.Int64{})
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typeNullUint = reflect.TypeOf(null.Uint{})
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typeNullUint8 = reflect.TypeOf(null.Uint8{})
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typeNullUint16 = reflect.TypeOf(null.Uint16{})
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typeNullUint32 = reflect.TypeOf(null.Uint32{})
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typeNullUint64 = reflect.TypeOf(null.Uint64{})
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typeNullString = reflect.TypeOf(null.String{})
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typeNullBool = reflect.TypeOf(null.Bool{})
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typeNullTime = reflect.TypeOf(null.Time{})
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typeTime = reflect.TypeOf(time.Time{})
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)
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// Bind executes the query and inserts the
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// result into the passed in object pointer
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func (q *Query) Bind(obj interface{}) error {
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typ := reflect.TypeOf(obj)
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kind := typ.Kind()
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if kind != reflect.Ptr {
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return fmt.Errorf("Bind not given a pointer to a slice or struct: %s", typ.String())
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}
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typ = typ.Elem()
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kind = typ.Kind()
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if kind == reflect.Struct {
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row := ExecQueryOne(q)
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err := BindOne(row, q.selectCols, obj)
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if err != nil {
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return fmt.Errorf("Failed to execute Bind query for %s: %s", q.table, err)
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}
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} else if kind == reflect.Slice {
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rows, err := ExecQueryAll(q)
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if err != nil {
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return fmt.Errorf("Failed to execute Bind query for %s: %s", q.table, err)
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}
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err = BindAll(rows, q.selectCols, obj)
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if err != nil {
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return fmt.Errorf("Failed to Bind results to object provided for %s: %s", q.table, err)
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}
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} else {
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return fmt.Errorf("Bind given a pointer to a non-slice or non-struct: %s", typ.String())
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}
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return nil
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}
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// BindOne inserts the returned row columns into the
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// passed in object pointer
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func BindOne(row *sql.Row, selectCols []string, obj interface{}) error {
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kind := reflect.ValueOf(obj).Kind()
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if kind != reflect.Ptr {
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return fmt.Errorf("BindOne given a non-pointer type")
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}
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pointers := GetStructPointers(obj, selectCols...)
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if err := row.Scan(pointers...); err != nil {
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return fmt.Errorf("Unable to scan into pointers: %s", err)
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}
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return nil
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}
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// BindAll inserts the returned rows columns into the
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// passed in slice of object pointers
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func BindAll(rows *sql.Rows, selectCols []string, obj interface{}) error {
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ptrSlice := reflect.ValueOf(obj)
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typ := ptrSlice.Type()
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ptrSlice = ptrSlice.Elem()
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kind := typ.Kind()
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var structTyp reflect.Type
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for i, exp := range []reflect.Kind{reflect.Ptr, reflect.Slice, reflect.Ptr, reflect.Struct} {
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if i != 0 {
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typ = typ.Elem()
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kind = typ.Kind()
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}
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if kind != exp {
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return fmt.Errorf("[%d] BindAll object type should be *[]*Type but was: %s", i, ptrSlice.Type().String())
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}
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if kind == reflect.Struct {
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structTyp = typ
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}
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}
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for rows.Next() {
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newStruct := reflect.New(structTyp)
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pointers := GetStructPointers(newStruct.Interface(), selectCols...)
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if err := rows.Scan(pointers...); err != nil {
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return fmt.Errorf("Unable to scan into pointers: %s", err)
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}
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ptrSlice.Set(reflect.Append(ptrSlice, newStruct))
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}
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return nil
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}
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func checkType(obj interface{}) (reflect.Type, bool, error) {
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val := reflect.ValueOf(obj)
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typ := val.Type()
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kind := val.Kind()
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if kind != reflect.Ptr {
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return nil, false, fmt.Errorf("Bind must be given pointers to structs but got type: %s, kind: %s", typ.String(), kind)
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}
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typ = typ.Elem()
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kind = typ.Kind()
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isSlice := false
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switch kind {
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case reflect.Slice:
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typ = typ.Elem()
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kind = typ.Kind()
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isSlice = true
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case reflect.Struct:
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return typ, isSlice, nil
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default:
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return nil, false, fmt.Errorf("Bind was given an invalid object must be []*T or *T but got type: %s, kind: %s", typ.String(), kind)
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}
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if kind != reflect.Ptr {
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return nil, false, fmt.Errorf("Bind must be given pointers to structs but got type: %s, kind: %s", typ.String(), kind)
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}
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typ = typ.Elem()
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kind = typ.Kind()
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if kind != reflect.Struct {
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return nil, false, fmt.Errorf("Bind must be a struct but got type: %s, kind: %s", typ.String(), kind)
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}
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return typ, isSlice, nil
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}
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// GetStructValues returns the values (as interface) of the matching columns in obj
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func GetStructValues(obj interface{}, columns ...string) []interface{} {
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ret := make([]interface{}, len(columns))
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val := reflect.Indirect(reflect.ValueOf(obj))
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for i, c := range columns {
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field := val.FieldByName(strmangle.TitleCase(c))
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ret[i] = field.Interface()
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}
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return ret
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}
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// GetStructPointers returns a slice of pointers to the matching columns in obj
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func GetStructPointers(obj interface{}, columns ...string) []interface{} {
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val := reflect.ValueOf(obj).Elem()
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var ret []interface{}
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if len(columns) == 0 {
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fieldsLen := val.NumField()
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ret = make([]interface{}, fieldsLen)
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for i := 0; i < fieldsLen; i++ {
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ret[i] = val.Field(i).Addr().Interface()
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}
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return ret
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}
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ret = make([]interface{}, len(columns))
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for i, c := range columns {
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field := val.FieldByName(strmangle.TitleCase(c))
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if !field.IsValid() {
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panic(fmt.Sprintf("Could not find field on struct %T for field %s", obj, strmangle.TitleCase(c)))
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}
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field = field.Addr()
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ret[i] = field.Interface()
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}
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return ret
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}
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// RandomizeSlice takes a pointer to a slice of pointers to objects
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// and fills the pointed to objects with random data.
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// It will ignore the fields in the blacklist.
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func RandomizeSlice(obj interface{}, blacklist ...string) error {
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ptrSlice := reflect.ValueOf(obj)
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typ := ptrSlice.Type()
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ptrSlice = ptrSlice.Elem()
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kind := typ.Kind()
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var structTyp reflect.Type
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for i, exp := range []reflect.Kind{reflect.Ptr, reflect.Slice, reflect.Ptr, reflect.Struct} {
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if i != 0 {
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typ = typ.Elem()
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kind = typ.Kind()
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}
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if kind != exp {
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return fmt.Errorf("[%d] RandomizeSlice object type should be *[]*Type but was: %s", i, ptrSlice.Type().String())
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}
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if kind == reflect.Struct {
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structTyp = typ
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}
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}
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for i := 0; i < ptrSlice.Len(); i++ {
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o := ptrSlice.Index(i)
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o.Set(reflect.New(structTyp))
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if err := RandomizeStruct(o.Interface(), blacklist...); err != nil {
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return err
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}
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}
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return nil
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}
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// RandomizeStruct takes an object and fills it with random data.
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// It will ignore the fields in the blacklist.
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func RandomizeStruct(str interface{}, blacklist ...string) error {
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// Don't modify blacklist
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copyBlacklist := make([]string, len(blacklist))
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copy(copyBlacklist, blacklist)
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blacklist = copyBlacklist
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sort.Strings(blacklist)
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// Check if it's pointer
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value := reflect.ValueOf(str)
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kind := value.Kind()
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if kind != reflect.Ptr {
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return fmt.Errorf("Outer element should be a pointer, given a non-pointer: %T", str)
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}
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// Check if it's a struct
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value = value.Elem()
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kind = value.Kind()
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if kind != reflect.Struct {
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return fmt.Errorf("Inner element should be a struct, given a non-struct: %T", str)
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}
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typ := value.Type()
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nFields := value.NumField()
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// Iterate through fields, randomizing
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for i := 0; i < nFields; i++ {
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fieldVal := value.Field(i)
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fieldTyp := typ.Field(i)
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found := sort.Search(len(blacklist), func(i int) bool {
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return blacklist[i] == fieldTyp.Name
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})
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if found != len(blacklist) {
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continue
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}
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if err := randomizeField(fieldVal); err != nil {
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return err
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}
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}
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return nil
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}
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// randDate generates a random time.Time between 1850 and 2050.
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// Only the Day/Month/Year columns are set so that Dates and DateTimes do
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// not cause mismatches in the test data comparisons.
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func randDate() time.Time {
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t := time.Date(
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1850+rand.Intn(200),
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time.Month(1+rand.Intn(12)),
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1+rand.Intn(25),
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0,
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0,
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0,
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0,
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time.UTC,
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)
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return t
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}
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func randomizeField(field reflect.Value) error {
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kind := field.Kind()
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typ := field.Type()
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var newVal interface{}
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if kind == reflect.Struct {
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b := rand.Intn(2) == 1
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switch typ {
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case typeNullBool:
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if b {
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newVal = null.NewBool(rand.Intn(2) == 1, b)
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} else {
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newVal = null.NewBool(false, false)
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}
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case typeNullString:
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if b {
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newVal = null.NewString(randStr(1), b)
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} else {
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newVal = null.NewString("", false)
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}
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case typeNullTime:
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if b {
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newVal = null.NewTime(randDate(), b)
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} else {
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newVal = null.NewTime(time.Time{}, false)
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}
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case typeTime:
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newVal = randDate()
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case typeNullFloat32:
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if b {
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newVal = null.NewFloat32(float32(rand.Intn(9))/10.0+float32(rand.Intn(9)), b)
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} else {
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newVal = null.NewFloat32(0.0, false)
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}
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case typeNullFloat64:
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if b {
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newVal = null.NewFloat64(float64(rand.Intn(9))/10.0+float64(rand.Intn(9)), b)
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} else {
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newVal = null.NewFloat64(0.0, false)
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}
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case typeNullInt:
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if b {
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newVal = null.NewInt(rand.Int(), b)
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} else {
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newVal = null.NewInt(0, false)
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}
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case typeNullInt8:
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if b {
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newVal = null.NewInt8(int8(rand.Intn(int(math.MaxInt8))), b)
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} else {
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newVal = null.NewInt8(0, false)
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}
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case typeNullInt16:
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if b {
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newVal = null.NewInt16(int16(rand.Intn(int(math.MaxInt16))), b)
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} else {
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newVal = null.NewInt16(0, false)
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}
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case typeNullInt32:
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if b {
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newVal = null.NewInt32(rand.Int31(), b)
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} else {
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newVal = null.NewInt32(0, false)
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}
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case typeNullInt64:
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if b {
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newVal = null.NewInt64(rand.Int63(), b)
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} else {
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newVal = null.NewInt64(0, false)
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}
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case typeNullUint:
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if b {
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newVal = null.NewUint(uint(rand.Int()), b)
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} else {
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newVal = null.NewUint(0, false)
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}
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case typeNullUint8:
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if b {
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newVal = null.NewUint8(uint8(rand.Intn(int(math.MaxInt8))), b)
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} else {
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newVal = null.NewUint8(0, false)
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}
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case typeNullUint16:
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if b {
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newVal = null.NewUint16(uint16(rand.Intn(int(math.MaxInt16))), b)
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} else {
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newVal = null.NewUint16(0, false)
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}
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case typeNullUint32:
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if b {
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newVal = null.NewUint32(uint32(rand.Int31()), b)
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} else {
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newVal = null.NewUint32(0, false)
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}
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case typeNullUint64:
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if b {
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newVal = null.NewUint64(uint64(rand.Int63()), b)
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} else {
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newVal = null.NewUint64(0, false)
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}
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}
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} else {
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switch kind {
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case reflect.Float32:
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newVal = float32(rand.Intn(9))/10.0 + float32(rand.Intn(9))
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case reflect.Float64:
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newVal = float64(rand.Intn(9))/10.0 + float64(rand.Intn(9))
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case reflect.Int:
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newVal = rand.Int()
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case reflect.Int8:
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newVal = int8(rand.Intn(int(math.MaxInt8)))
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case reflect.Int16:
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newVal = int16(rand.Intn(int(math.MaxInt16)))
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case reflect.Int32:
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newVal = rand.Int31()
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case reflect.Int64:
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newVal = rand.Int63()
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case reflect.Uint:
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newVal = uint(rand.Int())
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case reflect.Uint8:
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newVal = uint8(rand.Intn(int(math.MaxInt8)))
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case reflect.Uint16:
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newVal = uint16(rand.Intn(int(math.MaxInt16)))
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case reflect.Uint32:
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newVal = uint32(rand.Int31())
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case reflect.Uint64:
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newVal = uint64(rand.Int63())
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case reflect.Bool:
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var b bool
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if rand.Intn(2) == 1 {
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b = true
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}
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newVal = b
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case reflect.String:
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newVal = randStr(1)
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case reflect.Slice:
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sliceVal := typ.Elem()
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if sliceVal.Kind() != reflect.Uint8 {
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return fmt.Errorf("unsupported slice type: %T", typ.String())
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}
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newVal = randByteSlice(5 + rand.Intn(20))
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default:
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return fmt.Errorf("unsupported type: %T", typ.String())
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}
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}
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field.Set(reflect.ValueOf(newVal))
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return nil
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}
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const alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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func randStr(ln int) string {
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str := make([]byte, ln)
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for i := 0; i < ln; i++ {
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str[i] = byte(alphabet[rand.Intn(len(alphabet))])
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}
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return string(str)
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}
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func randByteSlice(ln int) []byte {
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str := make([]byte, ln)
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for i := 0; i < ln; i++ {
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str[i] = byte(rand.Intn(256))
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}
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return str
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}
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