Map

This is an attribute that is being used to map the class and its properties into its equivalent table and columns in the database.

Class Mapping

Let us say you have a the table named [department].[Person] like below.

CREATE TABLE [department].[Person]
(
    [Id] [bigint] IDENTITY(1,1) NOT NULL,
    [Name] [nvarchar](256) NOT NULL
)
ON [PRIMARY];
GO

And a model class named Person like below in which some of the column is not matching.

[Map("[department].[Person]")] // Use the mapping as the default schema is [dbo]
public class Person
{
    public long Id { get; set; }
    public string Name { get; set; }
}

You can also use the mapping if the table name and the class name is not matching in terms of casing.

Property Mapping

Let us say you have a the table named [department].[Person] like below.

CREATE TABLE [dbo].[Person]
(
    [Id] [bigint] IDENTITY(1,1) NOT NULL,
    [LName] [nvarchar](128) NOT NULL,
    [LName] [nvarchar](128) NOT NULL
)
ON [PRIMARY];
GO

And a model class named Person like below in which some of the columns are not matching.

public class Person
{
    public long Id { get; set; }
    [Map("FName")]
    public string FirstName { get; set; }
    [Map("LName")]
    public string LastName { get; set; }
}

Retrieval

You can use the ClassMappedNameCache to retrieve the mappings for the class.

var mappedName = ClassMappedNameCache.Get<Person>();

You can use either of the following.

The Get() method of the PropertyMappedNameCache
The GetMappedName() method of the ClassProperty

var properties = PropertyCache.Get<Person>();

// Iterate the properties
properties
    .AsList()
    .ForEach(property =>
    {
        var mappedName = property.GetMappedName(); // or PropertyMappedNameCache.Get(property.PropertyInfo);
    });