yomguithereal / decypher Goto Github PK

query.union();

Should be able to do:

query.limit(10);
// or, using string coercion
query.limit(database.int(10));

at the moment you can't do something like

var cypher = new Query();
cypher
   .match(...)
   .call('apoc.create.setLabels(...)');

See https://neo4j-contrib.github.io/neo4j-apoc-procedures/

Example

with a project folder structure like so:

queries
    | read_graph.cypher
src
    | queries
        | read_graph.cypher
    | file.js
index.js

Expected Behaviour:

I expect decypher('./queries/read_graph.cypher') to load either the one file (./queries/read_graph.cypher when calling decypher() in index.js) or the other (./src/queries/read_graph.cypher when calling decypher() in file.js).

Actual Behaviour:

decypher always loads ./queries/read_graph.cypher even when calling it from file.js because it uses fs.readFileSync here which seems to work with the working directory instead of the directory where the file is present.

I have made a few generic functions to do things like get some set of nodes (see pseudo code simple example below):

function getLabel
   cypher.match('(n:Label)')
      .return('n);

   return cypher;

I would like to reuse the base cypher query I wrote (in the above case MATCH (n:label)) in other functions. e.g.:

function deleteNodesWithLabel
   var getLabelQuery = getLabel();
   var deleteQuery = new Query();

   deleteQuery.add(getLabelQuery)
        .delete('n');

   return deleteQuery;

The above is a pretty forced pseudo code example but being able to make modular cypher queries for reuse would be very powerful.

I could, for the interim, just wait to put my .return('n') until I am actually about to run my query. However that forces all my functions to know about what my node variables are.

var cypher = new Query();
cypher.foreach('name in {names}', {names: ['a']}).merge('(c {name: name})');
cypher.toString(); // 'FOREACH name in {names}\nMERGE (c:colPHI {name: name});'

Foreach should have the following format:

FOREACH ( iterator in list | list of statements)

At this moment there seems to be no way to add multiple labels to a nodePattern since they are escaped. Maybe allow array and concatenate escaped labels?

As mentionned in shesek/cypher-query#1.