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42 lines
941 B
42 lines
941 B
package common
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import (
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"fmt"
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"go.mongodb.org/mongo-driver/mongo"
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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 LoadOne(db mongox.Database, target interface{}, filters ...interface{}) error {
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composed := query.Compose(append(filters, query.Limit(1))...)
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hasPreloader, _ := composed.Preloader()
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var result *mongo.Cursor
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var err error
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if hasPreloader {
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result, err = createAggregateLoad(db, target, composed)
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} else {
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result, err = createSimpleLoad(db, target, composed)
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}
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if err != nil {
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return fmt.Errorf("can't create find result: %w", err)
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}
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hasNext := result.Next(db.Context())
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if result.Err() != nil {
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return err
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}
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if !hasNext {
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return mongo.ErrNoDocuments
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}
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base.Reset(target)
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return result.Decode(target)
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}
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