Dictionary purpose

[Farias_Anderson (Anderson Farias)]

Hi,

Datamodeler 'Export TMS Aurelius Classes' has an option to 'generate Dictionary'

These Dictionaries have classes with Fields type TDictionaryAttribute

What are ther purpose/use cases for those Dictionaries/TDictionaryAttribute properties?

An exemple would be nice. 

Regards,

[wlandgraf (Wagner Landgraf)]

Hi Anderson,

The dictionary in the end is just a bunch of string constants so instead of building a query like this:

Manager.Find<TCustomer>.Where(Linq[‘Name’] = ‘Wagner’)

you do something like this:

Manager.Find<TCustomer>.Where(Linq[Dic.Customer.Name] = ‘Wagner’)

The only purpose is to avoid wrong typing of property names so you have errors at compile time instead of runtime. 

[Farias_Anderson (Anderson Farias)]

Got it. Thanks Wagner! Very nice.

BTW, 'Name' is defined as TDictionaryProperty. So one must use:

Linq[Dic.Customer,Name.PropName]

An implicit operator in the TDictionaryProperty record would solve this

class operator Implicit(AAttribbute: TDictionaryAttribute): string;

Thanks again. Regards

[Farias_Anderson (Anderson Farias)]

@Farias Anderson

'Name' is defined as TDictionaryProperty

I meant TDictionaryAttribute.

Sorry

[wlandgraf (Wagner Landgraf)]

Yes, we actually have plans to do a revamp of dictionary, it was created before TLinqExpression and record operations were created. A new dictionary will make query building much easier.