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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type FieldOPType ¶
type FieldOPType string
FieldOPType is the field operator passed in the Update API.
const ( Set FieldOPType = "$set" UnSet FieldOPType = "$unset" )
type FieldOperator ¶
type FieldOperator struct {
Op FieldOPType
Input jsoniter.RawMessage
}
A FieldOperator can be of the following type: { "$set": { <field1>: <value1>, ... } } { "$incr": { <field1>: <value> } } { "$unset": ["d"] }.
func NewFieldOperator ¶
func NewFieldOperator(op FieldOPType, val jsoniter.RawMessage) *FieldOperator
NewFieldOperator returns a FieldOperator.
type FieldOperatorFactory ¶
type FieldOperatorFactory struct {
FieldOperators map[string]*FieldOperator
}
The FieldOperatorFactory has all the field operators passed in the Update API request. The factory implements a MergeAndGet method to convert the input to the output JSON that needs to be persisted in the database.
func BuildFieldOperators ¶
func BuildFieldOperators(reqFields []byte) (*FieldOperatorFactory, error)
BuildFieldOperators un-marshals request "fields" present in the Update API and returns a FieldOperatorFactory The FieldOperatorFactory has the logic to remove/merge the JSON passed in the input and the one present in the database.
func (*FieldOperatorFactory) MergeAndGet ¶
func (factory *FieldOperatorFactory) MergeAndGet(existingDoc jsoniter.RawMessage) (jsoniter.RawMessage, error)
MergeAndGet method to converts the input to the output after applying all the operators. First "$set" operation is applied and then "$unset" which means if a field is present in both $set and $unset then it won't be stored in the resulting document.
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