Stardust.Paradox.Data.Annotations 2.2.0

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Install-Package Stardust.Paradox.Data.Annotations -Version 2.2.0
dotnet add package Stardust.Paradox.Data.Annotations --version 2.2.0
<PackageReference Include="Stardust.Paradox.Data.Annotations" Version="2.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Stardust.Paradox.Data.Annotations --version 2.2.0
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#r "nuget: Stardust.Paradox.Data.Annotations, 2.2.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install Stardust.Paradox.Data.Annotations as a Cake Addin
#addin nuget:?package=Stardust.Paradox.Data.Annotations&version=2.2.0

// Install Stardust.Paradox.Data.Annotations as a Cake Tool
#tool nuget:?package=Stardust.Paradox.Data.Annotations&version=2.2.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Stardust.Paradox

Entity framework'ish tool for developing .net applications using gremlin graph query language with CosmosDb

Usage (asp.net core)

Startup.cs

ConfigureServices

Add the generated entity implementations to the IOC container (I will provide an extention method to make this easier)

 services.AddEntityBinding((entityType, entityImplementation) => services.AddTransient(entityType, entityImplementation))
        .AddScoped<MyEntityContext,MyEntityContext>()
        .AddScoped<IGremlinLanguageConnector>(s => new CosmosDbLanguageConnector(DbAccountName, AccessKey, "databaseName","collectionName"));

Defining the model

[VertexLabel("person")]
public interface IPerson : IVertex
{
    string Id {get;}

    string FirstName { get; set; }

    string LastName { get; set; }
    
    string Email { get; set; }

    EpochDateTime Birthday {get;set;}//Wrapper type for DateTime that serializes into unix epoch. Can be used in predicate steps directly.

    IEdgeCollection<IPerson> Parents { get; }

    IEdgeCollection<IPerson> Children { get; }

    IEdgeCollection<IPerson> Siblings { get; }

    [EdgeLabel("city")] //pointing to the Residents property in ICity
    IEdgeReference<ICity> HomeCity { get; }//use IEdgeReference to enable task-async operations

    IEdgeCollection<ICompany> Employers { get; }
}

[VertexLabel("city")]
public interface ICity : IVertex
{
    string Id { get; }

    string Name { get; set; }

    string ZipCode { get; set; }
    

   [ReverseEdgeLabel("city")] //pointing to the HomCity property in IPerson
    IEdgeCollection<Iperson> Residents { get; } //use IEdgeCollection to enable task-async operations on the collection

    IEdgeReference<ICountry> Country { get; }
}

[VertexLabel("company")]
public interface ICompany : IVertex
{
    string Id { get; }

    string Name { get; set; }

    IEdgeCollection<ICompany> Employees { get; }
}

[VertexLabel("country")]
public interface ICountry : IVertex
{
    string Id { get; }

    string Name { get; set; }

    string CountryCode { get; set; }

    string PhoneNoPrefix { get; set; }

    IEdgeCollection<ICity> Cities { get; }
}

 [EdgeLabel("employer")]
    public interface IEmployment : IEdge<IProfile, ICompany>
    {
        string Id { get; }

        EpochDateTime HiredDate { get; set; }

        string Manager { get; set; }
    }

Defining the entity context and generating the entity implementations

public class MyEntityContext : Stardust.Paradox.Data.GraphContextBase
{
    public IGraphSet<IPerson> Persons => GraphSet<IPerson>();

    public IGraphSet<ICity> Cities => GraphSet<ICity>();

    public IGraphSet<ICountry> Countries => GraphSet<ICountry>();

    public IGraphSet<ICompany> Companies => GraphSet<ICompany>();

    public IGraphSet<IEmployment> Employments => EdgeGraphSet<IEmployment>();

    public MyEntityContext(IGremlinLanguageConnector connector, IServiceProvider resolver) : base(connector, resolver)
    {
    }

    protected override bool InitializeModel(IGraphConfiguration configuration)
    {
        //Added some fluent configuration of the edges
        configuration.ConfigureCollection<IPerson>()
                .AddEdge(t => t.Children, "children").Reverse<IPerson>(t => t.Parents)
            .ConfigureCollection<ICity>()
            .ConfigureCollection<ICountry>()
                .AddEdge(t=>t.Cities).Reverse<ICountry>(t=>t.Country)
            .ConfigureCollection<ICompany>()
                .AddEdge(t => t.Employees, "employees").Reverse<IPerson>(t => t.Employers)
                .ConfigureCollection<IEmployment>();;
        return true;
    }
}

Using the datacontext


public class DemoController:Controller
{
    private MyEntityContext _dataContext;
    public DemoController(MyEntityContext dataContext)
    {
        _dataContext=dataContext;
    }

    public Task<IActionResult> GetDataAsync(string personId)
    {
        var person=await _dataContext.Persons.GetAsync(persionId);
        return new User
        {
            Id=person.Id,
            FirstName=person.FistName,
            LastName=person.LastName,
            Email=person.Email
        }
    }

    public Task<IActionResult> AddEmploymentAsync(string userId, string companyId,DateTime hiredDate, string managerName) //new in V2
    {
        var user=await await _dataContext.Persons.GetAsync(persionId);
        var company=await _dataContext.Companies.GetAsync(companyId);
        var e= _dataContext.Employments.Create(user,company);
        e.HiredDate=hiredDate.ToEpoch();
        e.ManagerName=managerName;
        await _dataContext.SaveChangesAsync();
        //alternative
        
    }

    public Task<IActionResult> AddEmploymentAlternativeAsync(string userId, string companyId,DateTime hiredDate, string managerName) //edge property handling in V1
    {
        var user=await await _dataContext.Persons.GetAsync(persionId);
        var company=await _dataContext.Companies.GetAsync(companyId);
        user.Employers.Add(company,new Dictionary<string,object>{
            {"hiredDate",hiredDate.ToEpoch()},
            {"managerName","managerName"}
        })
        await _dataContext.SaveChangesAsync();
        //alternative
        
    }
}

Dynamic graph entities

In many cases we cannot model our graph as strong typed entities. Paradox supports hybrid entities by adding IDynamicGraphEntity to your edge or vertex definition you can model the well known peroperties on your entities, but at the same time assign and manipulate arbitary properties. These properties enjoy the same treatment as the typed properties with regards to parameterization and change tracking.

[VertexLabel("person")]
    public interface IProfile : IVertex, IDynamicGraphEntity
    {
        string Id { get; }

        string FirstName { get; set; }

        string LastName { get; set; }

        string Email { get; set; }

        bool VerifiedEmail { get; set; }

        string Name { get; set; }

        string Ocupation { get; set; }

        DateTime LastUpdated { get; set; }

        //[EdgeLabel("parent")]
        IEdgeCollection<IProfile> Parents { get; }

        //[ReverseEdgeLabel("parent")]
        IEdgeCollection<IProfile> Children { get; }

        [ToWayEdgeLabel("spouce")]
        IEdgeReference<IProfile> Spouce { get; }

        [Eager]
        [EdgeLabel("employer")]
        ICollection<ICompany> Employers { get; }


        [GremlinQuery("g.V('{id}').as('s').in('parent').out('parent').where(without('s')).dedup()")]
        IEdgeCollection<IProfile> Siblings { get; }

        [InlineSerialization(SerializationType.ClearText)]
        ICollection<string> ProgramingLanguages { get; }

        IEdgeCollection<IProfile> AllSiblings { get; set; }

        bool Adult { get; set; }
        
        string Description { get; set; }
        
        int Number { get; set; }
	    
        string Pk { get; set; }
	    
        EpochDateTime LastUpdatedEpoch { get; set; }
    }

usage

 var profile = await tc.VAsync<IProfile>("myId");
 profile.SetProperty("someRandomProp",$"test+:{DateTime.UtcNow.Ticks}");
 Console.WriteLine(profile.GetProperty("someRandomProp"));
 Console.WriteLine(string.Join(",",profile.DynamicPropertyNames))

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Stardust.Paradox.Data

Entityframework styled tool for accessing gremlin based graph databases like CosmosDB and Apache Tinkerpop

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3.0.0-rc01 878 2/14/2020
2.3.2 2,712 1/13/2020
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2.3.0 775 12/2/2019
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2.0.0 1,235 2/20/2019
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2.0.0-pre05 1,739 1/25/2019
2.0.0-pre03 474 1/23/2019
2.0.0-pre02 515 1/16/2019
2.0.0-pre01 463 12/5/2018
1.3.3 884 11/28/2018
1.3.2 812 11/6/2018
1.3.0 1,717 8/23/2018
1.0.1 1,445 8/10/2018
1.0.0-pre003 659 7/3/2018
1.0.0-pre002 559 7/3/2018
1.0.0-pre001 771 6/11/2018