gStore | gStore - a graph based RDF triple store

I believe that is an Optional because it was (sometimes) too messy to map the Lagrange multipliers from the solver to the constraints of the model.

If you're implementing an SQP solver may I suggest that you don't implement it in terms of ExpressionsBasedModel, but delegate to the convex solvers directly. Build something that implements org.ojalgo.optimisation.Optimisation.Solver and delegate to the various classes in the org.ojalgo.optimisation.convex package. Then you code more directly with the matrices, vectors and multipliers.

To make that solver usable by ExpressionsBasedModel you also implement an org.ojalgo.optimisation.Optimisation.Integration and register that by calling ExpressionsBasedModel.addPreferredSolver(myIntegeration) or ExpressionsBasedModel.addFallbackSolver(myIntegeration).

Implementing a solver and making it usable from the modelling tool are two separate things.

Akita provides us two types of stores:

• a basic store which can hold any shape of data

• an entity store which represents a flat collection of entities.

You chose second option(and that's the right choice for your geography collection) and created Entity based store. Now you need to provide a collection to Akita store but you're providing the whole json object. Akita tries to convert this object to array of entities but creates wrong array.

set()

Replace current collection with the provided collection, and resets the active entity

Taken from Akita docs

What you should do instead is to pass an Array to EntityStore.set method

When you trying to access key and key is not available when no data available, it gives the error

"Error Message : InvalidKey: A key should contain at least a kind"

To avoid this error first make sure that [datastrore.KEY] is available.

Thanks

*I think there is a problem with User model **

You should have a User model like this in /models/user.js (put models at the root of your application) to define User:

When you add a new record, filters wont be applicable for it unless you reapply them. You can reload the filters in order to apply it on newly added record after inserting it into the store.

It looks like graphql-genie supports GraphQL on Cloud Datastore. If that doesn't work for you, should should be able to adapt the Firestore with GraphQL code.

The dupes error normally occurs when a duplicate item in the array in encountered by ng-repeat, to get around this add track by $index: