cypher-query

0.0.12 • Public • Published

Progressive Cypher query builder API. Represnts the query as an object (a tiny wrapper around string expressions), allowing to pass it around and mutate it.

Written in CoffeeScript.

This is alpha quality software. It has not been throughtfully tested.

Install

npm install cypher-query

Usage

cypher = require 'cypher-query'
 
query = cypher()
  .start('n = node(*)')
  .where('n.name = {name}'name: 'Joe')
  .where('n.age > {age}')
  .params(age: 22)
  .return('n.email''n.age')
 
# Alternative API 
query = cypher
  start: 'n = node(*)'
  where: [ 'n.name = {name}''n.age > {age}' ]
  return: [ 'n.email''n.age' ]
  params: { name: 'Joe'age: 22 }
 
# Compile with toString() or compile() 
query.toString() # START n=node(*) 
                 # WHERE n.name = {name} AND n.age > {age} 
                 # RETURN n.email, n.age 
 
# Use params() to get all the collected params 
query.params() # { name: 'Joe', age: 22 } 
 
# Compile with compile(true) to embed the params into the string 
query.compile(true) # START n=node(*) 
                    # WHERE n.name = 'Joe' and n.age > 22 
                    # RETURN n.email, n.age 

With thingdom/node-neo4j

db = new neo4j.GraphDatabase
cypher = require 'cypher-query'
 
cypher().start('n=node(*)').execute db(err, res) ->
cypher(start: 'n=node(*)').execute db(err, res) ->
 
# Or install as db.builder() 
cypher.install(db)
db.builder().start('n=node(4)').execute (err, res) ->
db.builder(start: 'n=node(4)').execute (err, res) ->
 
# Or install globally to GraphDatabase's prototype 
cypher.install()

Utility methods

# Escape strings 
cypher.escape 'hello " world!' # "hello "" world!" 
 
# Escape identifiers 
cypher.escape_identifier 'some ` identifier' # `some `` identifier` 
 
# Build the MATCH pattern arrow string 
cypher.pattern type: 'knows'direction: 'out' # -[:knows]-> 

License

MIT

Package Sidebar

Install

npm i cypher-query

Weekly Downloads

4

Version

0.0.12

License

MIT

Last publish

Collaborators

  • nadav