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46 lines
1015 B
46 lines
1015 B
package database
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import (
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"github.com/mainnika/mongox-go-driver/v2/mongox"
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"github.com/mainnika/mongox-go-driver/v2/mongox/base"
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"github.com/mainnika/mongox-go-driver/v2/mongox/query"
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)
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// LoadOne function loads a first single target document by a query
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func (d *Database) LoadOne(target interface{}, filters ...interface{}) (err error) {
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composed, err := query.Compose(append(filters, query.Limit(1))...)
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if err != nil {
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return err
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}
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ctx := query.WithContext(d.Context(), composed)
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defer func() { _ = composed.OnClose().Invoke(ctx, target) }()
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cur, err := d.createCursor(target, composed)
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if err != nil {
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return err
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}
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defer func() { _ = cur.Close(ctx) }()
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hasNext := cur.Next(ctx)
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if cur.Err() != nil {
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return cur.Err()
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}
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if !hasNext {
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return mongox.ErrNoDocuments
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}
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if created := base.Reset(target); created {
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_ = composed.OnCreate().Invoke(ctx, target)
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}
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err = cur.Decode(target)
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if err != nil {
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return err
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}
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_ = composed.OnDecode().Invoke(ctx, target)
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return nil
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}
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