ORM Basics Adjusting SQL Data Types

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Overview

Using overrides to the ORMField attribute, developers can set what database type to store in a field.

Below is a table displaying the typeof() ORM Field Convertors.

ORM Field Convertor	Decisions Type	Store as SQL Type
EnumFieldConverter	Enum	String
KeyFieldConverter	PK	Primary Key
StringArrayFieldConverter	String[]	Serialized Text
TextFieldCoverter	String	nvarchar(max)
ORMZmlSerializedFieldConverter	XML	XML
ORMDataPairFieldConverter	DataPair	Serialized Text
ORMBinaryFieldConverter	Binary	Binary
ORMWritableFieldConverter	Generic Serialized Object Graph	Binary
FixedLengthStringFieldConverter	String	varchar(length)
EncryptedConverter	ANy	Encrypted Binary
BaseDateTimeConverter	DateTime	DateTime
BaseDateConverter	Date	DateTime
TimeFieldConverter	Time	Time
TimeSpanORMFieldConverter	TimeSpan	Long

The code snippet below demonstrates how to override a long text field. This field will become a nvarchar(max) field in SQL.

[ORMField(typeof(TextFieldConverter))]
[DataMember]
[WritableValue]
public string Description { get; set; }

Below is an example showing how to limit the text length of a field. This field will become a nvarchar(15) field in SQL.

[ORMField("phone_number", 15, typeof(FixedLengthStringFieldConverter))]
[DataMember]
[WritableValue]
public string PhoneNumber { get; set; }

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