New post
AllAccepted answers
Henry Pereira · Mar 27, 2020

Hi @Eduard Lebedyuk 
Yes, you are totally right. Using query class element will be concise and faster.
The point to use dynamic query are when the user choose the parameters to you do the query. 
Using my simple example, when the method receive a name param or a age param to build the where clause. I really don't know how to solve it using query class.
In my $0.02 maybe will create an ByName and a ByAge methods, and another to combine both.
Like I said, it's a simple example that can solved by an OR, but in a complex report with the user need to choose by parameters use dynamic query could be an alternative
 

Henry Pereira · Apr 26, 2019

Hi,

Have you tried to make the namespace a binary value and pass the user and password as a parameter?

s Attr3=$lb(128,"intersystems-Namespace",$lb("%SYS"))
 s Attr4=$lb(0,"intersystems-Routine",$lb("iscRoutine"))
 s Attr5=$lb(0,"intersystems-Roles",$lb("iscRole1","iscRole2"))
 s Attr6=$lb(0,"userPassword",$lb(password))
 s Attr7=$lb(0,"cn",$lb("test20"))
 s Attr8=$lb(0,"uidNumber",$lb(58129))
 s Attr9=$lb(0,"gidNumber",$lb(58129))
 s Attr10=$lb(0,"homeDirectory",$lb("/home/test20"))
 s Attributes=$lb(Attr1,Attr2,Attr3,Attr4,Attr5,Attr6,Attr7,Attr8,Attr9,Attr10)
 s Status=##Class(%SYS.LDAP).AddExts(LD,DN,Attributes,"","")
 i Status'=$$$LDAPSUCCESS w !,"AddExts error: "_Status_" - "_##Class(%SYS.LDAP).Err2String(Status) g LDAPError

You can see an example of that on LDAP.mac on Namespace Samples.

I hope that helped you

Henry Pereira · Jun 27, 2018

"So then if I store the Injection element_key (in the case of an array), as a property in the ImageFile object which references the injection, I will be able to get to the various Injection properties from the ImageFile instance? "

Sure, just to pay attention to manage the array key, that will be like your ID

"What would I store in the ImageFile in the case of a list? "

You can use list like a collection, could be of %SerialObjects or other types like %Strings, in the table will be save like $Piece in the column

Henry Pereira · Jun 27, 2018

Sorry for delay...

You can use both, as a list you will use the insert method like a relationship

Set inj = ##class(PET.Injection).%New(), inj.Desc = "blabla "_i
Do study.Injection.Insert(inj)

It will add a column with the list

You can use an array, but you must use SetAt:

Do study.InjectionArr.SetAt(inj,i)

And it will create another table with the name of the property