Metadata - Get Multiplicity for association ends

[Thorsten]

Hi,

I'm trying to get the multiplicity of both ends for a MetaNavigationMember.
If the association has both ends, then its no problem:

var source = navigationMember.Multiplicity;
var target = navigationMember.GetOppositeMember().Multiplicity;

But if the opposite end is not available, then the only thing thats left is the association type.
The question now is how these types should be interpreted:

        Reference = ManyToZeroOne/ManyToOne ?
        PolymorphicReference  = ManyToZeroOne/ManyToOne ?
        Collection  = ManyToMany ?
        OneToMany  = OneToMany
        OneToManyJointable = OneToMany
        ManyToManyJointable = ManyToMany
        DictionaryJointable = ManyToMany ?
        StructReference  = ManyToZeroOne/ManyToOne ?
        OneToOne, = OneToOne/ZeroOneToOne/OneZeroToOne

Thanks in advance.

Kind regards,

Thorsten

[Alexander]

Hello Thorsten,

You are on the right track, I will try to shed some more light on the different options and when they are used:

•         Reference    = This is used for 1:N associations with no target (collection) end. The multiplicity of the source end is One or ZeroOne (if the foreign key is nullable).
•         PolymorphicReference     = Same as above but also applies for references to interfaces or class hierarchies.
•         Collection     = Used for 1:N associations with no source (reference) end. The multiplicity of the target end is Many.
•         OneToMany     = Used for 1:N associations with two ends. The source is One/ ZeroOne and the target is Many.
•         OneToManyJointable    = Used for M:N associations with only one end (collection). The multiplicity of the source end is Many.
•         ManyToManyJointable    = Used for M:N associations with two ends. Both ends have multiplicity Many.
•         DictionaryJointable    = Used for one-sided dictionary associations. The multiplicity of the only source end is Many.
•         StructReference     = This is not supported at the moment, so you can ignore it.
•         OneToOne,    = OneToOne/ZeroOneToOne/OneZeroToOne - This is used for OneToOne associations with one or two ends. The source end is always One while the Target is ZeroOrOne.

Hope that helps.

Greetings,
Alexander
the Telerik team

[Thorsten]

Hi,

thanks a lot.
That'll help me.