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32 lines
949 B
32 lines
949 B
6 years ago
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package common
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import (
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"github.com/mainnika/mongox-go-driver/mongox"
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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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"github.com/mongodb/mongo-go-driver/mongo"
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"github.com/mongodb/mongo-go-driver/mongo/options"
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)
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// Count function counts documents in the database by query
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// target is used only to get collection by tag so it'd be better to use nil ptr here
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func Count(db *mongox.Database, target interface{}, filters ...interface{}) (int64, error) {
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collection := db.GetCollectionOf(target)
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opts := options.Count()
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composed := query.Compose(filters...)
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opts.Limit = composed.Limiter()
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opts.Skip = composed.Skipper()
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result, err := collection.Count(db.Context(), composed.M(), opts)
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if err == mongo.ErrNoDocuments {
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return 0, errors.NotFoundErrorf("%s", err)
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}
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if err != nil {
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return 0, errors.InternalErrorf("can't decode desult: %s", err)
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}
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return result, nil
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}
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