Introduction

Each Core Identity can have zero to N employments, whereas an employment is the combination of an organizational unit assignment, an optional function, an optional employment type, a validity range and optional attributes.

Properties

Whenever you are creating or updating an employment, you have to specify the following properties:

Property	Data Type	Example	Description
`Valid From`	Date	1.1.2022	When the employment validity starts
`Valid To`	Date	31.12.2030	When the employment validity ends
`Employment Number`	Int	1	A unique number of the employment
`Percentage`	Int	100	The employments percentage. Will affect the main employment calculation.
`Function`	DropDown	CEO	The associated function.
`Organizational Unit`	DropDown	ITSENSE AG	The organizational assignment.
`Employment Type`	DropDown	Intern	The associated employment type.
`State`	DropDown	Active	The state of the employment.
`Main Employment`	Bool	True	Indicates if this is the main employment or not.

Main Employment

If a person has more than one employment, there is often a need to determinate its main employment. This can be used in many places such as mappings. For example a Core Identity can have two employments but you would like to provision its job title to a target system. In order to determinate the job title, the main employment is used.

The rules to choose the main employment are as following:

Only consider employments, which are not in state “deleted”, then:

Main Employment is set
Order by
- Valid From and not expired
- Percentage
- Has valid to
- Valid to
- Id

The actual implementation might clear up any remaining questions:

return employments
    .Where(a => a.EmploymentState.Id != (uint)CoreIdentityEmploymentStates.Deleted)
    .OrderByDescending(a => a.EmploymentState.Id)
    .ThenByDescending(a => a.MainEmployment)
    .ThenByDescending(a => a.ValidFrom <= DateTime.Now && (!a.ValidTo.HasValue || a.ValidTo.Value >= DateTime.Now.Date))
    .ThenByDescending(a => a.Percentage)
    .ThenBy(a => a.ValidFrom)
    .ThenBy(a => a.ValidTo.HasValue)
    .ThenBy(a => a.ValidTo)
    .ThenBy(a => a.Id);

For further information there are also how-tos related to this topic:

https://itsense.atlassian.net/l/cp/21118Xwy