I have done a lot of reading by I can't seem to find the answer on this. If there's a duplicate post somewhere please point me to it!
Anyways, here it goes.
I'm trying to import data into Neo4J and create the relationships in order to easily graph the data. I was able to import the data without a problem using the LOAD CSV WITH HEADERS command now I'm not sure how to create the relationship piece.
My CSV/Table looks like this
source target action
172.x.x.x 172.y.y.y accept
172.x.x.x 172.y.y.y drop
All the data ends up in the same database and "table"
My goal is to have the following relationship scheme:
"Source"-------[action]------->"Target"
My first attempt was:
START n=node(*)
WHERE HAS(n.source) AND HAS(n.destination)
CREATE (n)-[:CONNECTS_TO]->(n)
I could not see the relationship at all after running this even though the browser shell said that it did create them and besides this does not take care of the "action" piece.
Any help would be appreciated.
You can load CSV into Neo4j by using following command
load csv with headers from "file:///file_path" as input
match (from:Node {source: input .source}),(to:Node {target:input.target})
create (from)-[:RELATION {type: input.action }]->(to)
*Note: You have to mention your lable name in the above query by replacing "Node".
Related
I am working on a project where I need to deal with Wiktionary. For some entries, there are context labels/tags before its sense I want to query for, e.g. idiomatic, transitive like HERE. I am now trying to use JWKTL, to do the job. But it seems no api call supports the query.
Can anyone let me know how to get that information by JWKTL, or, is there any other tool can parse the Wiktionary dump .xml file while being able to access that labels/tags?
Thanks.
According to Dr. Christian. Meyer, there is currently no API on this.
I ended up with pattern matching in the original wiktionary .xml dump.
I want to execute multiple cypher queries at same time for the brower, how count i execute that. And i am using noe4j version for 2.2.5. My sample query was,
CREATE(n:Taxonomy{UUID:10001, name:"BOSH", classType:"Interface Type", version:"2.2",isDeleted:"0"});
CREATE(n:Taxonomy{UUID:10002, name:"Iaas", classType:"AWS", version:"0.0",isDeleted:"0"});
CREATE(n:Taxonomy{UUID:10003, name:"order lifecycle", classType:"draft order", version:"0.0",isDeleted:"0"});
CREATE(n:IaaSTemplate{UUID:20001, IaasName:"Iaas Template 1",isDeleted:"0"});
CREATE(n:TemplateFunction{UUID:30001, functionName:"bosh target",isDeleted:"0"});
CREATE(n:TemplateFunction{UUID:30002, functionName:"bosh login",isDeleted:"0"});
Batching multiple queries into one is not (yet) supported by the Browser.
However, the specific queries in your question can be easily combined into a single query by:
Removing the n identifier from all the nodes.
Within a single query, an identifier is associated with a specific instance of a node or relationship (ignoring the effect of WITH clauses). But, since you don't actually use the identifier, getting rid of it would allow all the CREATE clauses to co-exist in the same query.
Removing all semicolons (except the last one).
So, this should work:
CREATE(:Taxonomy{UUID:10001, name:"BOSH", classType:"Interface Type", version:"2.2",isDeleted:"0"})
CREATE(:Taxonomy{UUID:10002, name:"Iaas", classType:"AWS", version:"0.0",isDeleted:"0"})
CREATE(:Taxonomy{UUID:10003, name:"order lifecycle", classType:"draft order", version:"0.0",isDeleted:"0"})
CREATE(:IaaSTemplate{UUID:20001, IaasName:"Iaas Template 1",isDeleted:"0"})
CREATE(:TemplateFunction{UUID:30001, functionName:"bosh target",isDeleted:"0"})
CREATE(:TemplateFunction{UUID:30002, functionName:"bosh login",isDeleted:"0"});
Unfortunately Neo4j Browser doesn't support that yet, it's on the long list of things.
You can use the bin/neo4j-shell that connects to a running browser.
Or a project like cycli which is a colorful, auto-complete shell for Neo4j that talks to the http interface and supports auth etc.
I want to implement a flight search system in Rails 4.
And I found this resource,
My questions are:
I've downloaded the airports.dat file and it contains chunks of data, do I need to import those data into psql? If yes, how?
If I just need the airport ID and name values, how do I selectively import them?
If I want to implement ajax load airport name just like the way expedia.com did, would it be buggy(slow loading time) if I use VPSs like Digitalocean?
Please advise me.
You can write a method that read line by line, and parse every line by the comma (","). Then you have enough information to insert to database.
For example:
flight1 = '507,"Heathrow","London","United Kingdom","LHR","EGLL",51.4775,-0.461389,83,0,"E","Europe/London"'
Then you can get the ID by call flight1.split(",")[0]
The speed of your search function is affected by your search algorithm and how do you implement the logic, and isn't affected by using a VPS.
I had a project in Redmine with more than 600 issues. I moved all the issues to a different project. I had no idea that the move deletes all the data for the custom fields!
So all the custom field values are now lost. I did not backup the database before this action as I really did not think that I was going to do any harm by moving issues as moving is a native function in the UI.
What I noticed is though that the production.log contains events for all creation and updates. All my 600 issues are in order in the production log. How can I use these log statements to repeat the actions? If I can import all the log actions, I can migrate the custom fields that it writes to the original Redmine instance and restore my values.
Entries look like this:
Processing IssuesController#update (for XX.XX.XX.X at 2013-02-07 11:19:54) [PUT]
Parameters: {"_method"=>"put", "authenticity_token"=>"nWNSSRYjHhN0BGb+Ya8M4pYWPPgsfdM=", "issue"=>{"assigned_to_id"=>"", "custom_field_values"=>{"10"=>"", "5"=>"Not translated", "1"=>"fi", "8"=>"http://screencast.com/t/ODknR8K", "9"=>"", "3"=>"", "4"=>""}, "done_ratio"=>"0", "due_date"=>"", "priority_id"=>"4", "estimated_hours"=>"", "start_date"=>"2013-02-07", "subject"=>"1\tInstallation in English", "tracker_id"=>"1", "lock_version"=>"0", "description"=>"Steps:\r\nOpen Nitro\r\n\r\nProblem:\r\nNot localized"}, "controller"=>"issues", "time_entry"=>{"hours"=>"", "activity_id"=>"", "comments"=>""}, "attachments"=>{"1"=>{"description"=>""}}, "id"=>"3876", "action"=>"update", "commit"=>"Submit", "notes"=>""}
I am really hoping that there is a way, any help will be greatly appreciated
You could use a decent text editor and/or spreadsheet application and do a massive find and replace and construct a series of UPDATE SQL commands and run them directly on the database (TEST FIRST!!)
Extract from log
Remove unnessary information
Copy into spreadsheet
Split text into columns
Add in columns with necessary SQL commands "UPDATE SET etc" copy into all rows of this column etc.
Join columns to make one text command per row
Export joined data to a text file
Run against test database as sql
If all goes well run against production database as sql
The log entry, following "Parameters:", looks like a regular Ruby hash definition. I'd parse that out and eval it back into a hash variable.
From there you will need to peel off elements and insert them into a database. I'd do that using Sequel, but use what works for you.
Talk to the RedMine support people and get the schema for their tables so you can figure out what data goes where and the database driver needed.
Using a default index, one can do nodeIndex.get("message", "Hello") for exact matches, or nodeIndex.query("message", "Hel*") for approximate Lucene-based queries. This works correctly for me from Java.
But how do I do approximate queries through the webadmin Data Browser interface? Exact matches work fine, such as:
node:index:nodeIndex:message:"Hello"
but I can't see how to do the wildcard queries. The syntax is shown in the pop-up help panel as:
node:index:[index]:[query]
but I don't know what to put for the [query] part, and can't find any examples of this in the manual or the wiki. Have tried the following without success:
node:index:nodeIndex:"message:Hel*"
node:index:nodeIndex:message:"Hel*"
node:index:nodeIndex:"Hel*"
node:index:nodeIndex:Hel*
This should work:
node:index:nodeIndex:message:Hel*
The queryis message:Hel* so you just append it, more complex queries are also possible.
See the lucene syntax guide.
node:index:nodeIndex:message:Hel* OR message:Wor*
Issue created. https://github.com/neo4j/community/issues/138