I am really sorry to ask a simple question like this, but it is getting frustrating. I installed neo4j 4.0.4 on my Windows machine, created a new project as shown in the official tutorial video and set a password for my local graph. Funnily, the tutorial video ends after setting the password and opening the browser not showing how to perform Cypher queries on this newly created database. In neo4j Desktop my database is shown correctly and it seems to be up and running.
However, when I try to connect to this database via the browser, I do not see the database at all. It is so confusing when connecting to the server to specify a username and password, if you only need to set a password for your database?! The default neo4j user can see the system and default database but not my project database. In addition, I cannot link files from the project directory in Cypher queries. I tried to disable authentication, but it did not help at all.
When I issue SHOW DATABASES command, it does not list my database as well.
Update / Edit:
Seems I misunderstood the concept of projects. Every database is named neo4j - default, regardless of the name specified in the project ?!. However, I still cannot access project files. So far, I copied the files manually in the database directory under "imports". But I guess that is not the intended way.
After importing data to this default database, it still shows no data in the project itself.
Data files in the imports directory are not automatically imported into the DB. That is because neo4j has no idea how you want to store that data as nodes and relationships.
So, it is up to you to determine your desired data model, and then write the appropriate code to enforce that data model.
You can take a look at this page to learn about how to import CSV data (probably the most commonly used import data format).
Related
this might be a stupid question but I'm new to neo4j.
I'm using the desktop version and from there I created a new database from a new project. I also can see it from the browser and I can see data and stuff.
But if I go on my terminal and run
cypher-shell
and from there I type
SHOW DATABASES;
I can only see the default dbs:
Does anyone know what I am doing wrong?
From the Neo4j desktop, you'll see the Start/Stop and Open buttons for a project database. Just to the right of these are 3-dots. Click on that and then open folder. This will get you to the various folders for the database. It's useful for seeing the size of the database, working with the config file, managing transaction logs, etc.
My Neo4j version is community-4.2.4 in the Mac OS.
I used 'bin/neo4j-admin load --from=xxx/g.db.dump --database=xxx.db --force'. And succeed in finding db file in /data/databases as photo showed below.
enter image description here
But the result returned in Browser adding 'show databases' and cannot find the database what I want.
Thanks u guys all for helping me.
OR sending email for communicating more at masichengyo#gamil.com.
So neo4j-admin load and neo4j-admin restore take care of setting up the db in the filesystem. Back in the 3.5.x days this was enough, provided the name of the graph directory matched the name of the active graph configured in the neo4j.conf.
In Neo4j 4.x we support multidatabase, and the system database is where we can do things such as creating new databases, and if you CREATE DATABASE in the system db with the name of the new database, it will use just use the files it finds and create the entry in the system db, allowing you to use it and switch to it in Neo4j.
Since you're on community edition, you won't be able to create a new database, you're restricted to only the neo4j database, so your import would have to force it using neo4j as the db name, and it would overwrite your current neo4j db.
If you need to create multiple databases besides neo4j and system, then you need to be using enterprise edition.
I am new in neo4j and i am using "neo4j-community-3.0.1" . I want to switch database and retrieve nodes .After google i found how to switch database . But there is no file with name
conf/neo4j-server.properties
There are two files neo4j.conf and neo4j-wrapper.conf . But there is not any configuration such
org.neo4j.server.database.location=data/graph.db
Can any one help me how to switch database and i am able to see node using
browser
As of Neo4J 3.0, all the configuration files have been streamlined and unified into one file. Which is "neo4j.conf".
You need to change the DB path in this file.
If you are using Linux the file can be found at
/etc/neo4j/neo4j.conf
The actual entry you need to change will be
dbms.directories.data=/var/lib/neo4j/data
If you are using the windows client for Neo4J Community. You should have an option to browse to a database directory before starting the database.
Quoting this link.
http://neo4j.com/blog/neo4j-3-0-massive-scale-developer-productivity/
"The new file, config and log structures in Neo4j 3.0 are designed to streamline operations and to bring Neo4j better into line with operational IT expectations. One notable change is to move from multiple config files to a single namespaced files."
The ops manual might also be of use to you.
http://neo4j.com/docs/operations-manual/current/
I'm currently evaluating Neo4J (2.0M3), and in an attempt to get some kind of visualisation and query-exploration (I haven't succeeded yet!), I switched from using the Test DB to an Embedded DB, and have a Server that I can start up when required.
I understand how to get my node and relationship data written to the data directory of my choice (via How to explore databases created by an embedded-Neo4j Java application and stored outside the /data directory?), and how to configure the Server/web console to point to that directory. Sure enough, the Dashboard does show the data counts I expect, but no Cypher query I try - not even the ones that work fine in my unit tests - return any nodes. Simple lookups by name and Id all fail.
Can anyone explain the inconsistency? This happens with a vanilla Server install, with data written to the default graph.db directory, as well as with different directories. The paths under 'Server Info' are all what I expetc to see.
Another thing I don't understand: why can I not have my own Server running, and create a GraphDatabaseFactory/GraphDatabaseService in code that will accept a server URI, which will allow me to use the standard Java API and see live updates in the web console without having to stop/start the server each time?
You can set up your embedded java project to even start a server, see http://www.cakesolutions.net/teamblogs/2012/05/23/enabling-neo4j-web-admin-tool-on-the-embedded-server-using-spring-data/
I've just started to learn the Neo4j graphs db, i am a .net developer and i have downloaded the .net version also the sample MVC project for .net (hour ago), I manage to make the project run and playing with it. Upon playing with the Cyphers Console, somehow i cant find the data's from the sample, maybe the default database of the console is pointing to the default db, how do i move to the database that is created by my sample project. is there such thing as database/schema here just like in MSSql/MySQL that tables are grouped by database?
thanks for response.
Look at neo4j-server.properties in conf folder in your DB folder, and search for org.neo4j.server.database.location and make sure it's pointing to the output folder you just created..