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38 lines
988 B
38 lines
988 B
package common
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import (
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"go.mongodb.org/mongo-driver/mongo"
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"github.com/mainnika/mongox-go-driver/mongox"
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"github.com/mainnika/mongox-go-driver/mongox/base"
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"github.com/mainnika/mongox-go-driver/mongox/errors"
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"github.com/mainnika/mongox-go-driver/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 errors.InternalErrorf("can't create find result: %s", err)
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}
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hasNext := result.Next(db.Context())
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if !hasNext {
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return errors.NotFoundErrorf("can't find result: %s", result.Err())
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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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