correct syntax saving to a multivalue CDT

RE: correct syntax saving to a multivalue CDT

davel001150 — Thu, 29 Nov 2018 17:01:32 GMT

Essentially create a new singular value of the CDT type using type constructor and input new values in type constructor, then use either append() function or updateArray() function to stick it onto the end of the array of CDT or update one of the existing values, respectively.

I think other answers have spelled out in detail how to use type constructor. For a simple enough CDT, I suppose dot notation could work, but it can grow impressively complicated rather swiftly. Type constructor method remains about equally convoluted regardless of size.

RE: correct syntax saving to a multivalue CDT

Joubin Izadi — Tue, 27 Nov 2018 18:39:52 GMT

Hey Paul,

If I'm understanding you correctly, you have a rule input that is a CDT array. It begins with one CDT. You want to append a new CDT to this rule input.

mohamedt808 and sagarl511 both had good solutions - I've compiled them into the below code sample to make it clearer what they were suggesting:

The first button uses dictionary format to add to our CDT array.

The second button uses casting to add to our CDT array.

There is one rule input (ri!cdtArray) of Any Type.

I also created a CDT named "emp" with two fields, id (number), and name (text).

{
  a!forEach(
    items: ri!cdtArray,
    expression: a!textField(
      label: "Item #" & fv!index & ": ",
      value: fv!item,
      readOnly: true
    )
  ),
  a!buttonArrayLayout(
    buttons: {
      a!buttonWidget(
        label: "Add to RI With Dictionary (1, Brian)",
        saveInto: {
          a!save(
            ri!cdtArray,
            append(
              ri!cdtArray,
              {id: 1, name: "brian"}
            )
          )
        }
      ),
      a!buttonWidget(
        label: "Add to RI With Cast (2, Jenny)",
        saveInto: {
          a!save(
            ri!cdtArray,
            append(
              ri!cdtArray,
              'type!{urn:com:appian:types}emp'(
                id: 2,
                name: "Jenny"
              )
            )
          )
        }
      )
    }
  )
}

Hope that helps!

RE: correct syntax saving to a multivalue CDT

sainadhn401 — Tue, 27 Nov 2018 04:23:50 GMT

If you are still looking for a solution.
I had similar issue the way i used to overcome is as follows. May not be recommended when data set is really huge.
a!foreach(
items: ri!cdt.field,
expression:
a!save(ri!cdt[fv!index].field,
{index(ri!multipleListVariable,fv!index,0)}
)
)
PS: the target CDT and multipleListVariable should of same length. Most probably this should be the case.

RE: correct syntax saving to a multivalue CDT

Dastagiri Dudekula — Mon, 10 Sep 2018 05:40:25 GMT

First, create a cdt with the required fields. Second create a rule to map the array values to the cdt using type! constructor. Third call the rule on button click by passing the generated array cdt values. In case of multiple cdts use for each.

RE: correct syntax saving to a multivalue CDT

sagarl511 — Mon, 10 Sep 2018 04:33:37 GMT

I suggest to use type!CDT() to create/construct object of data/cdt type on the fly and then use saveinto(cdt[2],type!CDT()), only if the values are in different rule inputs.

RE: correct syntax saving to a multivalue CDT

chandu — Fri, 07 Sep 2018 16:51:11 GMT

Hi Paul, Please go through the below SAIL Recipe you will get good Idea
docs.appian.com/.../recipe_add_edit_and_remove_data_in_an_inline_editable_grid.html

RE: correct syntax saving to a multivalue CDT

mudit — Fri, 07 Sep 2018 14:17:39 GMT

Thanks For correcting, You are right.

RE: correct syntax saving to a multivalue CDT

santhosh Kumar — Fri, 07 Sep 2018 13:53:32 GMT

Values can be saved only in load() variable, rule input, process variable, or node input as a target but not functions. Here Index() is a function and so it would throw error if you use it on saveinto or a!save() as a target..

Wrong Usage : a!save(index(ri!test,1,null()), value)
Correct Usage : a!save(ri!test[1], value)

I am wondering whether you are successfully able to save a value using index() as a target which ideally would throw error.

RE: correct syntax saving to a multivalue CDT

mudit — Wed, 05 Sep 2018 14:54:01 GMT

There is no best practice defined for use of dot in a!save (at least nothing i found) at most places index is recommended when it comes to CDTs .Also When index is recommended for CDTs and array retrieval of data i see no reason why it cant be used to save it.

This link might help you for clear understanding.

community.appian.com/.../47704

RE: correct syntax saving to a multivalue CDT

santhosh Kumar — Wed, 05 Sep 2018 14:23:48 GMT

Index function should not be used in save operation as it would throw error. For save operations dot operator should be used as ri!cdt.column

RE: correct syntax saving to a multivalue CDT

mohamedt808 — Wed, 05 Sep 2018 14:14:26 GMT

hi paul,

you should have a value that is initialized.

incase if this interface rule is placed inside a for each you can use index parameter,

i.e:

value:{id:fv!index} ,
saveInto:a!save(target , append(target,save!value))

RE: correct syntax saving to a multivalue CDT

mudit — Wed, 05 Sep 2018 13:53:54 GMT

Use the below code format .. Hope it helps.

value:ri!xyz,
saveInto:{
a!save(index(cdt,"column1",{}),save!value),
a!save(index(cdt2,"column2",{}),save!value)
/*you can use  many repetetions */
}

RE: correct syntax saving to a multivalue CDT

bradc — Wed, 05 Sep 2018 13:29:16 GMT

Hi Paul,

I typically do the following:

a!save(target: ri!CDT, value: append(ri!CDT,type!CDT(field1: "ABC", field2: "123")))

RE: correct syntax saving to a multivalue CDT

Rama Thummala — Wed, 05 Sep 2018 12:40:19 GMT

Hi pauls0003 ,

Suppose, if you want to save field1 of CDT[1]

saveInto:{
a!save(
cdt[2].field1,
cdt[1].field1
)
}

Hope it helps..!!