Pocos Generator

When all you want are Pocos

If you prefer to work with a micro-orm like Dapper, but hate manually writing POCO classes for your tables, this is the right tool for you.
A port of EZPoco T4 templates to .Net Core 2.0+ using dotnet-script.

Generates POCO classes from your database tables and views. For SQL Server, also generates a class with names of stored procedures, and a class with the name and columns of table-valued parameters.

Getting Started

Prerequisites

The only prerequisite is dotnet-script.
Follow the install instructions for your platform.

Usage

PocosGenerator works in an opt-in style, regarding your database tables. By default all tables are ignored, you have to manually enable the ones you want to generate a POCO for.

In the PocosGenerator.csx file, edit the following section:

if (generator.ReadSchema()){

    // Let's remove ignore for tables and views we need
    /*
        generator.Tables["tablename"].Ignore = false;
    */

    generator.Tables["Users"].Ignore = false;

    /*
        // Tweak Schema
        generator.Tables["tablename"].Ignore = true;                        // To ignore a table
        generator.Tables["tablename"].ClassName = "newname";                // To change the class name of a table
        generator.Tables["tablename"]["columnname"].Ignore = true;          // To ignore a column
        generator.Tables["tablename"]["columnname"].PropertyName="newname"; // To change the property name of a column
        generator.Tables["tablename"]["columnname"].PropertyType="bool";    // To change the property type of a column
    */

    generator.GenerateClass();
}

You can execute the script from command line:

dotnet script PocosGenerator.csx -- output:MyModels.cs connectionstring:ConnectionStrings:MyDatabase config:..\Config\connectionstrings.json

Parameters are in form of param:value, any order.

Parameter	Default	Purpose
output	DbModels.cs	Name of created file.
config	appsettings.json	Config file to read the connection string from. Relative to script location.
connectionstring	ConnectionStrings:DefaultConnection	The connection string to use for the database.
namespace	Models	.Net Namespace of the generated classes.
pocos	true	Generate POCOs.
views	true	Also include views. If false, only tables are considered.
schema	null	Restrict to a specific schema (ex. "dbo.").
classprefix	null	Add a prefix to the generated class names (ex. "AccountingTableName").
classsufix	null	Add a sufix to the generated class names (ex. "TableNameReporting").
spclass	null	Name of the class holding the stored procedures. Not generated if null.
tvpclass	null	Name of the class holding the table valued parameters. Not generated if null.
dapper	false	Decorate POCOs with attributes for Dapper.Contrib. Nuget package must be included in your project.

You can also run it from Visual Studio Code. Install the C# for Visual Studio Code plugin.
To create the launch.json file for you environment, first run this command in the folder containing the .csx files:

dotnet script init

When running from VS Code, set your options in the PocosGenerator.csx file, this section:

if (!Args.Any()){
    options.Output = "DbModels.cs";
    options.ConfigFilePath = @"..\Config\connectionstrings.json";
    options.Namespace = "Db.Models";
    options.ConnectionStringName = "ConnectionStrings:MyDatabase";
    options.SpClass = "spData";
    options.TvpClass = "tvpData";
}

Example usage of the generated classes with Dapper

        // _connection is an SqlConnection
        public async Task<IEnumerable<Role>> GetAllRoles()
        {
            return await _connection.QueryAsync<Role>(
                spData.dbo_UsersRole_GetAll,
                commandType: CommandType.StoredProcedure
                );
        }

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This script was tested with SQL Server only. To make it work with other databases, edit the PocosGenerator.GetDbConnection() method and return a correct DbConnection instance.