Database.Bolt.Extras.Query

Documentation

type GraphGetRequest = Graph NodeName NodeGetter RelGetter

The combinations of Getters to load graph from the database.

type GraphGetResponse = Graph NodeName Node URelationship

The graph of Nodes and URelationships which we got from the database using GraphGetRequest.

type GraphPutRequest = Graph NodeName PutNode PutRelationship

The graph of Nodes with specified uploading type and URelationships.

type GraphPutResponse = Graph NodeName BoltId BoltId

The graph of BoltIds corresponding to the nodes and relationships which we get after putting GraphPutRequest.

data NodeGetter

Helper to find Nodes.

Constructors

NodeGetter

Fields

• boltIdN :: Maybe BoltId
• labelsN :: Maybe [Label]
• propsN :: Maybe [Property]

Instances

Show NodeGetter

Methods

showsPrec :: Int -> NodeGetter -> ShowS

show :: NodeGetter -> String

showList :: [NodeGetter] -> ShowS

type NodeName = Text

data PutNode

PutNode is the wrapper for Node where we can specify if we want to merge or create it.

Constructors

BoltId BoltId

MergeN Node

CreateN Node

Instances

Show PutNode

Methods

showsPrec :: Int -> PutNode -> ShowS

show :: PutNode -> String

showList :: [PutNode] -> ShowS

data PutRelationship

PutRelationship is the wrapper for Relationship where we can specify if we want to merge or create it.

Constructors

MergeR URelationship

CreateR URelationship

Instances

Show PutRelationship

Methods

showsPrec :: Int -> PutRelationship -> ShowS

show :: PutRelationship -> String

showList :: [PutRelationship] -> ShowS

data RelGetter

Helper to find URelationships.

Constructors

RelGetter

Fields

• labelR :: Maybe Label
• propsR :: Maybe [Property]

Instances

Show RelGetter

Methods

showsPrec :: Int -> RelGetter -> ShowS

show :: RelGetter -> String

showList :: [RelGetter] -> ShowS

class ToCypher a where

The class for convertation into Cypher.

Minimal complete definition

toCypher

Methods

toCypher :: a -> Text

Instances

ToCypher Value

Convertation for Value into Cypher.

Methods

toCypher :: Value -> Text

ToCypher Property

Converts property with name and value to name:value.

Methods

toCypher :: Property -> Text

ToCypher Label

Label with name are formatted into :name

Methods

toCypher :: Label -> Text

ToCypher [Property]

Several properties are formatted with concatenation.

Methods

toCypher :: [Property] -> Text

ToCypher [Label]

Several labels are formatted with concatenation.

Methods

toCypher :: [Label] -> Text

getGraph :: MonadIO m => [Text] -> GraphGetRequest -> BoltActionT m [GraphGetResponse]

For the given GraphGetRequest find all graphs, which match it. This function creates single cypher query and performs it.

putGraph :: MonadIO m => GraphPutRequest -> BoltActionT m GraphPutResponse

Creates graph using given GraphPutRequest. If there were multiple choices while merging given _vertices, the first match is used for connection.

setNode :: MonadIO m => NodeGetter -> [Property] -> BoltActionT m BoltId

setNode updates properties for the node, corresponding to the given NodeGetter.

deleteNodes :: MonadIO m => [BoltId] -> BoltActionT m [BoltId]

deleteNodes is used to delete all nodes with given BoltIds and all corresponding relatioships.