/
find.go
178 lines (148 loc) · 3.62 KB
/
find.go
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package sutando
import (
"context"
"reflect"
"github.com/pkg/errors"
"github.com/yanun0323/sutando/option"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
type find struct {
q querying
optOne *options.FindOneOptions
optMany *options.FindOptions
}
func newFind(collection *mongo.Collection) finding {
return &find{
q: newQuery(collection),
optOne: options.FindOne(),
optMany: options.Find(),
}
}
func (f *find) Exists(key string, exists bool) finding {
f.q.Exists(key, exists)
return f
}
func (f *find) And(key string, value any) finding {
f.q.And(key, value)
return f
}
func (f *find) Equal(key string, value any) finding {
f.q.Equal(key, value)
return f
}
func (f *find) NotEqual(key string, value ...any) finding {
f.q.NotEqual(key, value...)
return f
}
func (f *find) Greater(key string, value any) finding {
f.q.Greater(key, value)
return f
}
func (f *find) GreaterOrEqual(key string, value any) finding {
f.q.GreaterOrEqual(key, value)
return f
}
func (f *find) Less(key string, value any) finding {
f.q.Less(key, value)
return f
}
func (f *find) LessOrEqual(key string, value any) finding {
f.q.LessOrEqual(key, value)
return f
}
func (f *find) Contain(key string, value ...any) finding {
f.q.Contain(key, value...)
return f
}
func (f *find) In(key string, value ...any) finding {
f.q.In(key, value...)
return f
}
func (f *find) NotIn(key string, value ...any) finding {
f.q.NotIn(key, value...)
return f
}
func (f *find) Regex(key string, regex string, opt ...option.Regex) finding {
f.q.Regex(key, regex, opt...)
return f
}
func (f *find) First() finding {
f.q.first()
return f
}
func (f *find) Bson(e ...bson.E) finding {
f.q.Bson(e...)
return f
}
func (f *find) Sort(value map[string]bool) finding {
s := make([]bson.E, 0, len(value))
for k, v := range value {
e := bson.E{Key: k, Value: -1}
if v {
e.Value = 1
}
s = append(s, e)
}
f.optMany.SetSort(s)
return f
}
func (f *find) Limit(i int64) finding {
f.optMany.SetLimit(i)
return f
}
func (f *find) Skip(i int64) finding {
f.optOne.SetSkip(i)
f.optMany.SetSkip(i)
return f
}
func (f *find) Exec(ctx context.Context, p any) error {
if reflect.TypeOf(p).Kind() != reflect.Pointer {
return errors.New("mongo: object to find should be a pointer")
}
kind := reflect.TypeOf(p).Elem().Kind()
if kind == reflect.Array {
return errors.New("mongo: object to find cannot be an array")
}
if kind != reflect.Slice {
if !f.q.isOne() {
return errors.New("mongo: find too many results! use query with 'First' to find one result")
}
return f.execFindOne(ctx, p)
}
if !f.q.isOne() {
return f.execFindMany(ctx, f, p)
}
obj := reflect.New(reflect.TypeOf(p).Elem().Elem())
err := f.execFindOne(ctx, obj.Interface())
if err != nil {
return err
}
sli := reflect.Append(reflect.ValueOf(p).Elem(), obj.Elem())
reflect.ValueOf(p).Elem().Set(sli)
return nil
}
func (f *find) execFindOne(ctx context.Context, p any) error {
result := f.q.col().FindOne(ctx, f.q.build(), f.optOne)
if errors.Is(result.Err(), mongo.ErrNoDocuments) {
return ErrNoDocument
}
err := result.Decode(p)
if err != nil {
return errors.Errorf("mongo: decode document error: %+v", err)
}
return nil
}
func (f *find) execFindMany(ctx context.Context, q finding, p any) error {
cursor, err := f.q.col().Find(ctx, f.q.build(), f.optMany)
if err != nil {
return errors.Errorf("mongo: invoke finding error: %+v", err)
}
defer cursor.Close(ctx)
err = cursor.All(ctx, p)
if err != nil {
return errors.Errorf("mongo: decode using cursor error: %+v", err)
}
return nil
}