Interface IBaseEntity

This is the base interface all entities within LemonEdge must implement.

All the properties on this base interface are implemented by *every* entity in LemonEdge, and thus exist as columns for every table in the database

Inherited Members
System.IEquatable<LemonEdge.API.Core.IBaseEntity>.Equals(LemonEdge.API.Core.IBaseEntity)
System.ComponentModel.INotifyPropertyChanged.PropertyChanged
System.ComponentModel.INotifyPropertyChanging.PropertyChanging
Namespace: LemonEdge.API.Core
Assembly: API.dll
Syntax
public interface IBaseEntity : IEquatable<IBaseEntity>, INotifyPropertyChanged, INotifyPropertyChanging, ICloneableAsync, ICanTrackProperties

Properties

AccountID

Links to UniqueAccountID. LemonEdge is a multi-tenanted system, and thus you can have several different accounts all residing in the same database

The default root account is 1

This property holds the account the item belongs to. It can not be modified by a user, it is maintained internally by the system

Declaration
[EntityProperty(SQLType.BigInt, false)]
long AccountID { get; set; }
Property Value
Type Description
System.Int64

CanvasID

Links to ICanvas. If this record is within a canvas, this holds the canvas id for the record.

By ensuring all items in the system have a canvas property, we can guarantee a mechanism for isolating canvases and ensuring all entities are compatabile with them

Declaration
[EntityProperty(SQLType.UniqueIdentifier, true)]
[EntityRelationship(EntityID.Canvas, "ID", SingleJoinType.ZeroToOne, "Canvas", "Contained In Canvas", DeleteWithRelationship = true, PartOfParentSet = false, LinkToItemInSet = false, PreventAutoConstraint = true)]
Guid? CanvasID { get; set; }
Property Value
Type Description
System.Nullable<System.Guid>

ID

All items in the system have a globally unique id.

This is used instead of auto-increment numbers for several reasons, but the main one being it enables all entities to be designed to cope with importing/exporting/copying. It is very easy to create an entire copy of an account into another one by maintaining the same ids

Declaration
[EntityProperty(SQLType.UniqueIdentifier, false)]
Guid ID { get; set; }
Property Value
Type Description
System.Guid

LastUpdated

The server datetime stamps of when this item was last udpated in the system

By ensuring every record has a datetimestamp for changes, and by keeping all old records, we can ensure the entire system can be ran as of any point in time in the past

Declaration
[EntityProperty(SQLType.DateTimeOffset, false)]
DateTimeOffset LastUpdated { get; set; }
Property Value
Type Description
System.DateTimeOffset
Remarks

We should always use datetimeoffsets. They are international, with time zones, but most importantly odata supports them and not datetime

ModifiedByUserID

Links to IUser. This holds the id of the user that made the change to the item

Declaration
[EntityProperty(SQLType.UniqueIdentifier, false, FriendlyLabel = "Modified By User")]
[EntityRelationship(EntityID.Users, "ID", SingleJoinType.One, "Modified By User", "Modifications Made By User", LinkToItemInSet = false)]
Guid ModifiedByUserID { get; set; }
Property Value
Type Description
System.Guid

Methods

GetLabel(String)

For properties that are Guid properties holding a relationship to another entity, this function returns the label held for that id

This is done by the class that implements this interface holding a xxx_Label property for every xxx Guid relationship property with a label

Declaration
string GetLabel(string propName)
Parameters
Type Name Description
System.String propName

The Guid relationship property name to return the label for that item of
Returns
Type Description
System.String

The label held for the specified guid relationship property

SetLabel(String, String)

For properties that are Guid properties holding a relationship to another entity, this function can be used to set the label held for that id

This is used throughout the client UI by the platform to update the labels held when users choose different items for relationships so the UI immediately reflects these choices

This is done by the class that implements this interface holding a xxx_Label property for every xxx Guid relationship property with a label

Declaration
void SetLabel(string propName, string value)
Parameters
Type Name Description
System.String propName

The Guid relationship property name to update the label for that item of
System.String value

The new label value for the corrosponding property id

SetSilentLabel(String, String)

The same as SetLabel(String, String) except done without raising any System.ComponentModel.INotifyPropertyChanged events

Declaration
void SetSilentLabel(string propName, string value)
Parameters
Type Name Description
System.String propName

The Guid relationship property name to update the label for that item of
System.String value

The new label value for the corrosponding property id

Extension Methods