I've generated a Neo4j graph and created visualization of the graph using the 'Style' rules on 'Data Browser'. I was able to display the properties of the Nodes. It looks like the style rules can only be applied to Nodes. However I want to display (visualize on data browser) the properties on the relationship. Is this possible? If so, how do I do it?
I read through the Neo4j documentation and also searched in the Neo4j forums but had no luck.
I appreciate any help.
TIA
For example:
(is a)
(Josh) --------------------> (Male)
(demographic=gender)
(created=09/25/12)
Where demographic, created are properties of the relationship 'is a'.
Well, since you extended the question to available options, not just Webadmin:
The Neo folks put up a side about visualization options: http://www.neo4j.org/develop/visualize
For your use case, try Neoclipse https://github.com/neo4j/neoclipse/downloads
it allows to specify which properties to display on nodes and relationship (be sure to enable the filters in the Graph Database View or the preferences won't have any effect). It look similar to the webadmin, but can be customized more.
Related
I am new to Neo4j and I want to add a new node to an existing relationship using Structr platform.
This is the Cypher query that I tested in Neo4j web browser and it works.
match(projects:Project {name:'IRIS Recognition Java'})
create(client:Client {name:'Andreas Pal'}) CREATE(projects)-[w:IS_PART_OF]->(client)
return w
In the Structr platform I created a table that contains all the existing projects from database and I want to assign a member to the project.
I tried to put in a table date a query to bring also the clients. And I don't know how to create the assign. Any help would be very much appreciated. Thank you.
You need to use Structr's means of editing the data in the database. If you use Cypher directly, you are modifying the data on a different (wrong) level. You can either use Structr directly to create relationships, or you have to make the relationships in a way that Structr can detect and "see" those relationships.
Please have a look at https:/support.structr.com/article/295 for more information.
I'm building a Neo4J system just do to visualization in the Neo4J browser. I build the various nodes and relationships and I can visualize the database by running match (n) return n. The problem is that the resulting display shows the relationship names but not their associated properties. Can anyone tell me the cypher query to show the entire database including relationship properties? Thanks.
The neo4j browser does not support visualizing all properties (for nodes or relationships) at the same time. Such a capability would generally result in a very congested and unusable visualization, especially since the browser would also have to display the property names.
You can, however, opt to show the value of a single property per node label or or relationship type as its caption. You can do that manually, or you can edit the GRASS file to set all of the captions at once. As an example of how to set relationship captions in the GRASS file, the following entry in that file would specify that all BAR relationships should show their foo property:
relationship.BAR {
caption: '{foo}';
}
I've got my graph database, populated with nodes, relationships, properties etc. I'd like to see an overview of how the whole database is connected, each relationship to each node, properties of a node etc.
I don't mean view each individual node, but rather something like an ERD from a relational database, something like this, with the node labels. Is this possible?
You can use the metadata by running the command call db.schema().
In Neo4j v4 call db.schema() is deprecated, you can now use call db.schema.visualization()
As far as I know, there is no straight-forward way to get a nicely pictured diagram of a neo4j database structure.
There is a pre-defined query in the neo4j browser which finds all node types and their relationships. However, it traverses the complete graph and may fail due to memory errors if you have to much data.
Also, there is neoprofiler. It's a tool which claims to so what you ask. I never tried and it didn't get too many updates lately. Still worth a try: https://github.com/moxious/neoprofiler
Even though this is not a graphical representation, this query will give you an idea on what type of nodes are connected to other nodes with what type of relationship.
MATCH (n)
OPTIONAL MATCH (n)-[r]->(x)
WITH DISTINCT {l1: labels(n), r: type(r), l2: labels(x)}
AS `first degree connection`
RETURN `first degree connection`;
You could use this query to then unwind the labels to write that next cypher query dynamically (via a scripting language and using the REST API) and then paste that query back into the neo4j browser to get an example set of the data.
But this should be good enough to get an overview of your graph. Expand from here.
I am trying to use Gephi to help graph interview analysis results. The relationship map is only used to describe conventional connections and life cycles. What I would like to do is to size the nodes based on the number of interview responses that talk about the node, not the number of connections it has or the weighting of those connections. Can Gephi do this and if so, how do I do it please?
I have loaded in node weightings and can see this as part of node labels, but haven't been able to find a way of this having an effect on node size.
Many thanks
Data input field - change input format to integer
You can load the graph in gexf format adding a float attribute and add this attribute to ALL the nodes. It would like something like:
```
...
...
```
Once imported in Gephi, just go to the appearance tab and it will appear as one more attribute in "ranking" drop-down list.
If any problem with gefx format, let me know and I'll will share a whole example (just trying to remain short :-)
Regards
Short question
Does Neo4j support constraints based on a domain-model?
Explanation
In the basic tutorial, it says "Please keep this picture at hand all the time. It details the domain-model for this tutorial." (https://stack.versal.com/api2/assets/fdc05cea-e18b-44ea-8ba9-e119d7a8f872).
But is there any way to check that data stored into the graph respect this domain-model?
For relational databases, we have "create" instructions to build the domain-model and "insert" instructions to store data in compliance with this domain-model.
For graph database in Neo4j, I only found "create" instructions where we can specify a type (that would be part of the domain-model).
What I need to do
I need to create a domain-model that prevent the creation of nodes which are not compliants with the domain-modeln for example:
the node type must be in the domain-model
a type of association can only link nodes with specific types
Example
With the movie domain-model coming from the tutorial (https://stack.versal.com/api2/assets/fdc05cea-e18b-44ea-8ba9-e119d7a8f872) :
A node can only be of type Person or Movie
A Movie can't have outgoing edges
A DIRECTED or ACTED_IN relationship can't link two Persons
...
Is this possible in Neo4j?
Or do I have to create checkers on the model?
You will have to create checkers of the model or an API that guarantees that only nodes matching the model are added.
Some things that you describe will be added in Neo4j in the future but it has not been decided when.
But I saw a presentation of the http://structr.org application framework today that allows you to model a schema with types, properties and relationships with cardinalities.