Stardust.Paradox.Data 2.1.1

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

Install-Package Stardust.Paradox.Data -Version 2.1.1
dotnet add package Stardust.Paradox.Data --version 2.1.1
<PackageReference Include="Stardust.Paradox.Data" Version="2.1.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Stardust.Paradox.Data --version 2.1.1
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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
        
    }
}

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
        
    }
}

Release Notes

Added support for typed Edges.
Added parameterized queries for connectors that support it, for connectors that doesnt support it input strings are escaped to avoid some injection attacks
Added support for partitioning (CosmosDB)
Added missing 'and' overload and fixed get edge partitioning issue.
Added missing 'and' overload
Bugfix: new TypedEdge is not saved when no properties are updated
Bugfix: Parameterization of numbers larger than int.MaxValue fails when calling cosmosDB
Enhancement: Added EpochDateTime type to handle datetime values better.
Enhancement: Added support for EpochDateTime in the appropriate predicate steps

Version History

Version Downloads Last updated
2.1.1 99 4/2/2019
2.1.0 59 4/2/2019
2.0.6 55 4/1/2019
2.0.5 69 3/27/2019
2.0.4 88 3/6/2019
2.0.0 78 2/20/2019
2.0.0-pre29 64 2/19/2019
2.0.0-pre26 62 2/14/2019
2.0.0-pre23 65 2/12/2019
2.0.0-pre15 67 2/6/2019
2.0.0-pre11 101 2/4/2019
2.0.0-pre09 89 1/25/2019
2.0.0-pre02 83 1/16/2019
2.0.0-pre01 144 12/5/2018
1.4.9 68 2/8/2019
1.4.8 184 12/6/2018
1.4.7 108 11/28/2018
1.4.5 99 11/21/2018
1.4.4 111 11/20/2018
1.4.3 132 11/6/2018
1.4.1 106 10/30/2018
1.4.0 111 10/22/2018
1.3.11 111 10/16/2018
1.3.5 118 10/15/2018
1.3.4 176 10/8/2018
1.3.3 171 10/2/2018
1.3.2 135 9/11/2018
1.3.1 199 8/23/2018
1.3.0 131 8/23/2018
1.2.0 144 8/20/2018
1.1.5 128 8/15/2018
1.0.4 120 8/14/2018
1.0.3 119 8/13/2018
1.0.2 118 8/13/2018
1.0.1 121 8/10/2018
1.0.0-pre005 197 7/3/2018
1.0.0-pre001 153 6/11/2018