customizing query for ignoring vertices

[Bharat Dighe]

In my application, the vertices can be marked to be ignored. They are not removed, they are just hidden using a flag.

The application has tons of complex queries using gremlin traversal. Is there way these vertices which are marked are filtered out without modifying all these queries.

g.V().has("type", x").out().has("name", "y").toList();

can be converted to 

g.V().has("type", x").hasNot("ignore").out().has("name", "y").hasNot("ignore").toList();

Is there a way in the framework that certain steps can be inserted in a traversal?

Thanks

Bharat

[Shashwat Arghode]

Hi Bharat,

I don't have a sample gremlin graph to verify the approach.

But following article with use of side effects might help. Please check.

https://stackoverflow.com/questions/41628841/how-to-exclude-certain-vertices-in-gremlin-titan

Thanks,

Shashwat.

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[Bharat Dighe]

If I have to modify all the queries then solution is simple.

I asking if there is something in the gremlin framework where a step can inserted after all the steps in the traversal object. 

Bharat

On Thursday, April 12, 2018 at 5:39:50 PM UTC-7, Shashwat Arghode wrote:

Hi Bharat,

I don't have a sample gremlin graph to verify the approach.

But following article with use of side effects might help. Please check.

https://stackoverflow.com/questions/41628841/how-to-exclude-certain-vertices-in-gremlin-titan

Thanks,

Shashwat.

On Thu, Apr 12, 2018 at 7:52 PM, Bharat Dighe <bdi...@gmail.com> wrote:

In my application, the vertices can be marked to be ignored. They are not removed, they are just hidden using a flag.

The application has tons of complex queries using gremlin traversal. Is there way these vertices which are marked are filtered out without modifying all these queries.

g.V().has("type", x").out().has("name", "y").toList();

can be converted to 

g.V().has("type", x").hasNot("ignore").out().has("name", "y").hasNot("ignore").toList();

Is there a way in the framework that certain steps can be inserted in a traversal?

Thanks

Bharat

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[Daniel Kuppitz]

You can use the SubgraphStrategy. By doing that you only need to use a new TraversalSource, all your queries will be the same.

Cheers,

Daniel

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[Bharat Dighe]

Fantastic !!! 

Thanks Daniel, can't wait to try this.

[Bharat Dighe]

The version we are using does not have withStratergies()

Can it be achieved using withSideEffects() ?

Thanks

Bharat

[Stephen Mallette]

What version does not have withStrategies()?

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[Daniel Kuppitz]

Every version has withStrategies(), no version has withStratergies() :)

Cheers,

Daniel

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