neo4j-cypher | A Ruby DSL for the Neo4j Cypher query language

 by   andreasronge Ruby Version: Current License: No License

kandi X-RAY | neo4j-cypher Summary

kandi X-RAY | neo4j-cypher Summary

neo4j-cypher is a Ruby library typically used in User Interface, Neo4j applications. neo4j-cypher has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

A Ruby DSL for the Neo4j Cypher query language
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            kandi-support Support

              neo4j-cypher has a low active ecosystem.
              It has 25 star(s) with 5 fork(s). There are 4 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 2 open issues and 2 have been closed. On average issues are closed in 48 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of neo4j-cypher is current.

            kandi-Quality Quality

              neo4j-cypher has 0 bugs and 0 code smells.

            kandi-Security Security

              neo4j-cypher has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              neo4j-cypher code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              neo4j-cypher does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              neo4j-cypher releases are not available. You will need to build from source code and install.
              neo4j-cypher saves you 1835 person hours of effort in developing the same functionality from scratch.
              It has 4052 lines of code, 336 functions and 40 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed neo4j-cypher and discovered the below as its top functions. This is intended to give you an instant insight into neo4j-cypher implemented functionality, and help decide if they suit your requirements.
            • Returns the expected message for this user
            • Executes a query
            • Returns true if this assertion is expected
            Get all kandi verified functions for this library.

            neo4j-cypher Key Features

            No Key Features are available at this moment for neo4j-cypher.

            neo4j-cypher Examples and Code Snippets

            No Code Snippets are available at this moment for neo4j-cypher.

            Community Discussions

            QUESTION

            Neo4j Cypher: Filtering a query results based on another query
            Asked 2021-Jan-26 at 19:54

            I am trying to find a list of names that unique to one query and exclude the ones that are common between the results of two queries. For example, I want the name of the classes that have been taken by students A, B, and C. And exclude from this list the classes that were taken by students D and E. With the help of the answer to this question (Neo4j Cypher: exclude certain nodes from result), I tried this Cypher code and it works, but I get the results as nodes. I want it as a list of names, not nodes.

            ...

            ANSWER

            Answered 2021-Jan-26 at 19:54

            You can have another WITH and UNWIND.

            Source https://stackoverflow.com/questions/65906762

            QUESTION

            How to return a list of composite objects in Cypher?
            Asked 2020-Feb-27 at 17:18

            If I wanted to return a composite object, based on an exisiting node, I know that I could to this: (thanks to this post)

            ...

            ANSWER

            Answered 2020-Feb-27 at 17:18
            MATCH(...)-[:HAS_DB]->(db: Database {name: "my_database")
            WITH DISTINCT db
            Return COLLECT( { name: db.name,
                   format: db.format,
                 }) AS database
            
            

            Source https://stackoverflow.com/questions/60437174

            QUESTION

            NoSuchMethodError: com.fasterxml.jackson.datatype.jsr310.deser.JSR310DateTimeDeserializerBase.findFormatOverrides on Databricks
            Asked 2020-Feb-19 at 08:46

            I'm working on a rather big project. I need to use azure-security-keyvault-secrets, so I added following to my pom.xml file:

            ...

            ANSWER

            Answered 2019-Dec-27 at 18:36

            So I managed to fix the problem with the maven-shade-plugin. I added following piece of code to my pom.xml file:

            Source https://stackoverflow.com/questions/59498535

            QUESTION

            Neo4J cypher: remove loops from flattened resultset
            Asked 2020-Jan-14 at 14:25

            This is an extension of the following question:

            I have a data lineage related graph in Neo4J with variable length path containing intermediate nodes (tables) as an array:

            ...

            ANSWER

            Answered 2020-Jan-14 at 14:25

            QUESTION

            Neo4j Cypher return only rows with count greater than 1
            Asked 2019-Dec-20 at 22:03

            First of all, I have looked at Can Neo4j Cypher query do similar thing as "Having" in SQL? and https://neo4j.com/developer/kb/how-do-i-achieve-the-equivalent-of-a-sql-having-clause-with-cypher/. They both have similar advice, but it doesn't seem to work in my case (perhaps because of the UNWIND clause I have?).

            Here's my query:

            ...

            ANSWER

            Answered 2019-Dec-20 at 22:03

            When you have an aggregate function in Cypher, think of anything not part of the aggregate as part of the group by in SQL. Instead of grouping by node t, it looks like you want to group by the value of property t.propTwo across multiple nodes.

            Let's build some sample data.

            Source https://stackoverflow.com/questions/59413050

            QUESTION

            Getting java.lang.NoClassDefFoundError: Could not initialize class org.apache.poi.ooxml.util.DocumentHelper after upgrading to POI 4.0.0
            Asked 2019-Apr-26 at 02:48

            15 to poi 4.0.0. Here are the poi dependencies I have on classpath.

            poi-4.0.0 poi-scratchpad-4.0.0 poi-ooxml-4.0.0 poi-ooxml-schemas-4.0.0 xmlbeans-3.0.1

            Getting below exception when I try to close workbook

            ...

            ANSWER

            Answered 2018-Oct-09 at 17:25

            I am having the same issue. I noticed something in the change log that seems to indicate a breaking change in regards to the write() method and automatically closing the OutputStream. I am wondering if that is the issue.

            https://poi.apache.org/changes.html#4.0.0

            Source https://stackoverflow.com/questions/52658175

            QUESTION

            SyntaxError: WITH is required between CREATE and MATCH
            Asked 2019-Apr-07 at 17:05

            I'm very beginner to Cypher query. So, I'm trying to understand MATCH and CREATE. Here's what I am currently defining relationship between author and the book:

            ...

            ANSWER

            Answered 2019-Apr-07 at 17:05

            You can find the syntax error is WITH required between CREATE and MATCH.

            WITH should be between CREATE of the third line and MATCH of the fifth(fourth?) line.

            WITH is needed to chain, pipe the results from one query part to next. If this is confusing you, don't worry. You can read more here.

            As you are not passing any results from the first part to second you don't need it, but it's syntactically incorrect.

            You can add WITH in your query as shown below to remove the error.

            Source https://stackoverflow.com/questions/55561052

            QUESTION

            Neo4j syntax for WITH statement
            Asked 2019-Jan-23 at 15:42

            I am trying to auto generate a a text file that can be run to create the nodes and relationships for a Neoj4 Graph.

            The text file is being created in two sections:

            First the nodes are created in a For loop (6000 nodes) with a result like this:

            ...

            ANSWER

            Answered 2019-Jan-23 at 15:25

            You need to separate the statements with a semicolon, Please refer following queries:

            Source https://stackoverflow.com/questions/54328389

            QUESTION

            Neo4j: Iterating from leaf to parent AND finding common children
            Asked 2018-Dec-11 at 20:45

            I've migrated my relational database to neo4j and am studying whether I can implement some functionalities before I commit to the new system. I just read two neo4j books, but unfortunately they don't cover two key features I was hoping would be more self-evident. I'd be most grateful for some quick advice on whether these things will be easy to implement or whether I should stick to sql! Thx!

            Features I need are: 1) I have run a script to assign :leaf label to all nodes that are leaves in my tree. In paths between a known node and its related leaf nodes, I aim to assign to every node a level property that reflects how many hops that node is from the known node (or leaf node - whatever I can get to work most easily).

            I tried: match path=(n:Leaf)-[:R*]->(:Parent {Parent_ID: $known_value}) with n, length(nodes(path)) as hops set n.Level2=hops;

            and path=(n:Leaf)-[:R*]->(:Parent {Parent_ID: $known_value}) with n, path, length(nodes(path)) as hops foreach (n IN relationships (path) | set n.Level=hops);

            The first assigns property with value of full length of path to only leaf nodes. The second assigns property with value of full length of path to all relationships in path.

            Should I be using shortestpath instead, create a bogus property with value =1 for all nodes and iteratively add weight of that property?

            2) I need to find the common children for a given parent node. For example, my children each [:like] lots of movies, and I would like to create [:like] relationships from myself to just the movies that my children all like in common (so if 1 of 1 likes a movie, then I like it too, but if only 2 of 3 like a movie, nothing happens).

            I found a solution with three paths here: Need only common nodes across multiple paths - Neo4j Cypher But I need a solution that works for any number of paths (starting from 1).

            3) Then I plan to start at my furthest leaf nodes, create relationships to children's movies, and move level by level toward my known node and repeat create relationships, so that the top-most grandparent likes only the movies that all children [of all children of all children...] like in common and if there's one that everybody agrees on, that's the movie the entire extended family will watch Saturday night.

            Can this be done with neo4j and how hard a task is it for someone with rudimentary Cypher? This is mostly how I did it in my relational database / Should I be looking at implementing this totally differently in graph database?

            Most grateful for any advice. Thanks!

            ...

            ANSWER

            Answered 2018-Dec-10 at 10:12

            1.

            shortestPath() may help when your already matched start and end nodes are not the root and the leaf, in that it won't continue to look for additional paths once the first is found. If your already matched start and end nodes are the root and the leaf when the graph is a tree structure (acyclic), there's no real reason to use shortestPath().

            Typically when setting something like the depth of a node in a tree, you would use length(path), so the root would be at depth 0, its children at depth 1.

            Usually depth is calculated with respect to the root node and not leaf nodes (as an intermediate node may be the ancestor of multiple leaf nodes at differing distances). Taking the depth as the distance from the root makes the depths consistent.

            Your approach with setting the property on relationships will be a problem, as the same relationship can be present in multiple paths for multiple leaf nodes at varying depths. Your query could overwrite the property on the same relationship over and over until the last write wins. It would be better to match down to all nodes (leave out :Leaf in the query), take the last relationship in the path, and set its depth:

            Source https://stackoverflow.com/questions/53699383

            QUESTION

            How to delete a node and all relationships, and node which is connected to it in Neo4j
            Asked 2018-Dec-09 at 13:13

            I want to delete the the special "root" node in my Neo4j Database.

            I already found some Question/Answer in SO, but they are not useful, from different reason.

            We uses a db:DATABASE node for store the tenant data in Neo4j, and all other node is somehow connected to this node. So the real Neo4j Root Node just have connections to this DATABASE-s. It means whet a new node is created under the tenant, this new node intermediately has a connection to DATABASE node, and the connection name is CONTAINS.

            here is the creation code of the DATABASE node

            ...

            ANSWER

            Answered 2018-Dec-09 at 13:13

            Okay, this should be a simple one.

            Provided that the :Database node for the tenant and all reachable nodes from it are to be deleted, without regard for node label or relationship type connecting them, the fastest approach will be to use path expander procs from APOC Procedures to match to all nodes in the subgraph and delete them:

            Source https://stackoverflow.com/questions/53692494

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install neo4j-cypher

            You can download it from GitHub.
            On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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