Entity-Framework with DOTNETCORE Scaffolding

Entity-Framework-DOTNETCORE-notes.txt

I am annoyed as fck there is no point-and-click UI to do this;
Hence these notes as a reminder;

FIRST INSTALL via NuGet in YOUR project (NB: you may have multiple projects in the solution!)
a) 'Microsoft.EntityFrameworkCore.Tools'; choose same Framework version that your project will target;
b) 'Microsoft.EntityFrameworkCore.SqlServer'; choose the PROVIDER you want to use in the Scaffold-DbContext command.
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0) Open the (Nuget) package manager console: Tools /NuGet PM / PM Console 

1) **EXAMPLE**: (all on one line)
Scaffold-DbContext "Server=MyServerName\SQLExpress;Database=MyProjDB;User Id=dev_user1;Password=dev_user1;MultipleActiveResultSets=true;" Microsoft.EntityFrameworkCore.SqlServer 
-Namespace "WebApi.ModelTemp" -Context "EntitiesCtx" -DataAnnotations -OutputDir ModelTemp

-DataAnnotations creates classes with Attributes; (the classic style of .NET Fx v4.x
if this is ommitted, it will use the Fluid API style, which I think is total crap, because you cannot see at a glance field properties;
e.g. field-sizes (specially max string lengths), PK's, FK's (you will have to go hunt around for that info, pathetic really to the clever smartarse who devised this Fluid BS)

-Namespace is used, because by default it uses the project name (in my case, my Proj name had underscores, e.g. My-Project-WebApi.prj;
So the scaffolding cmd tries to create a namespace as My-Project-WebApi.ModelTemp WHICH IS illegal/not valid !

-Context is used so I can control the dbCtx object name, I don't want it to follow MyDatabaseNameDB -> MyDatabaseNameDBContext



2) For help, see the next command;
In general, type 'get-help NuGet' to see all available NuGet commands (where NuGet is the Powershell NuGet module)

PM> get-help scaffold-dbcontext –detailed
Do you want to run Update-Help?
The Update-Help cmdlet downloads the most current Help files for Windows PowerShell modules, and installs them on your computer. For more information about the Update-Help cmdlet, see https:/go.microsoft.com/fwlink/?LinkId=210614.
[Y] Yes  [N] No  [S] Suspend  [?] Help (default is "Y"):y

NAME
    Scaffold-DbContext
    
SYNOPSIS
    Scaffolds a DbContext and entity types for a database.
    
    
SYNTAX
    Scaffold-DbContext [-Connection] <String> [-Provider] <String> [-OutputDir <String>] [-ContextDir <String>] [-Context <String>] [-Schemas 
    <String[]>] [-Tables <String[]>] [-DataAnnotations] [-UseDatabaseNames] [-Force] [-NoOnConfiguring] [-Project <String>] [-StartupProject 
    <String>] [-Namespace <String>] [-ContextNamespace <String>] [-NoPluralize] [-Args <String>] [<CommonParameters>]
    
    
DESCRIPTION
    Scaffolds a DbContext and entity types for a database.
    

PARAMETERS
    -Connection <String>
        The connection string to the database.
        
    -Provider <String>
        The provider to use. (E.g. Microsoft.EntityFrameworkCore.SqlServer)
        
    -OutputDir <String>
        The directory to put files in. Paths are relative to the project directory.
        
    -ContextDir <String>
        The directory to put the DbContext file in. Paths are relative to the project directory.
        
    -Context <String>
        The name of the DbContext. Defaults to the database name.
        
    -Schemas <String[]>
        The schemas of tables to generate entity types for.
        
    -Tables <String[]>
        The tables to generate entity types for.
        
    -DataAnnotations [<SwitchParameter>]
        Use attributes to configure the model (where possible). If omitted, only the fluent API is used.
        
    -UseDatabaseNames [<SwitchParameter>]
        Use table and column names directly from the database.
        
    -Force [<SwitchParameter>]
        Overwrite existing files.
        
    -NoOnConfiguring [<SwitchParameter>]
        Don't generate DbContext.OnConfiguring.
        
    -Project <String>
        The project to use.
        
    -StartupProject <String>
        The startup project to use. Defaults to the solution's startup project.
        
    -Namespace <String>
        The namespace to use. Matches the directory by default.
        
    -ContextNamespace <String>
        The namespace of the DbContext class. Matches the directory by default.
        
    -NoPluralize [<SwitchParameter>]
        Don't use the pluralizer.
        
    -Args <String>
        Arguments passed to the application.
        
    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer, PipelineVariable, and OutVariable. For more information, see 
        about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216). 
    
REMARKS
    To see the examples, type: "get-help Scaffold-DbContext -examples".
    For more information, type: "get-help Scaffold-DbContext -detailed".
    For technical information, type: "get-help Scaffold-DbContext -full".
    For online help, type: "get-help Scaffold-DbContext -online"


PM> 

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