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Implement single document loaders through find cursor

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This commit is contained in:
Nikita Tokarchuk
2019-05-16 23:59:54 +02:00
parent a686800b8d
commit 7c056dfc07
2 changed files with 30 additions and 30 deletions
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mongox/common/loadbinary.go
+15 -15
View File
@@ -6,30 +6,30 @@ import (
"github.com/mainnika/mongox-go-driver/mongox/query"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
// LoadBinary function loads a first single target document by a query
func LoadBinary(db *mongox.Database, target interface{}, filters ...interface{}) (bson.Raw, error) {
collection := db.GetCollectionOf(target)
opts := options.FindOne()
composed := query.Compose(filters...)
composed := query.Compose(append(filters, query.Limit(1))...)
hasPreloader, _ := composed.Preloader()
opts.Sort = composed.Sorter()
var result *mongo.Cursor
var err error
result := collection.FindOne(db.Context(), composed.M(), opts)
if result.Err() != nil {
return nil, errors.InternalErrorf("can't create find one result: %s", result.Err())
}
bytes, err := result.DecodeBytes()
if err == mongo.ErrNoDocuments {
return nil, errors.NotFoundErrorf("%s", err)
if hasPreloader {
result, err = createAggregateLoad(db, target, composed)
} else {
result, err = createSimpleLoad(db, target, composed)
}
if err != nil {
return nil, errors.InternalErrorf("can't decode desult: %s", err)
return nil, errors.InternalErrorf("can't create find result: %s", err)
}
return bytes, nil
hasNext := result.Next(db.Context())
if !hasNext {
return nil, errors.NotFoundErrorf("can't find result: %s", result.Err())
}
return result.Current, nil
}
mongox/common/loadone.go
+15 -15
View File
@@ -5,30 +5,30 @@ import (
"github.com/mainnika/mongox-go-driver/mongox/errors"
"github.com/mainnika/mongox-go-driver/mongox/query"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
// LoadOne function loads a first single target document by a query
func LoadOne(db *mongox.Database, target interface{}, filters ...interface{}) error {
collection := db.GetCollectionOf(target)
opts := options.FindOne()
composed := query.Compose(filters...)
composed := query.Compose(append(filters, query.Limit(1))...)
hasPreloader, _ := composed.Preloader()
opts.Sort = composed.Sorter()
var result *mongo.Cursor
var err error
result := collection.FindOne(db.Context(), composed.M(), opts)
if result.Err() != nil {
return errors.InternalErrorf("can't create find one result: %s", result.Err())
}
err := result.Decode(target)
if err == mongo.ErrNoDocuments {
return errors.NotFoundErrorf("%s", err)
if hasPreloader {
result, err = createAggregateLoad(db, target, composed)
} else {
result, err = createSimpleLoad(db, target, composed)
}
if err != nil {
return errors.InternalErrorf("can't decode desult: %s", err)
return errors.InternalErrorf("can't create find result: %s", err)
}
return nil
hasNext := result.Next(db.Context())
if !hasNext {
return errors.NotFoundErrorf("can't find result: %s", result.Err())
}
return result.Decode(target)
}