Prevent user from selecting duplicate values in custom picker

Hello Jawara,

Option 1)
Let's think your picker saveInto:local!arrray
Try union (local!arrray, local!arrray)
This will make your users able to select the same but you will save it just once.

Option 2)
In the custom picker in the suggestFunction send the current list, and when you query the DB or service or even in memory filter out those already selected values

Jose

May be following code works for you : 

 

load(
a!formLayout(
firstColumnContents: {
a!pickerFieldCustom(
label: "Select User",
suggestFunction: rule!TEST_pickerSuggestFn(
searchText: _,
selectedUsers: ri!selectedUsers
),
selectedLabels: ri!selectedUsers,
value: ri!selectedUsers,
saveInto: ri!selectedUsers
)
}
)
)

selectedUsers - User (List)

 

rule!TEST_pickerSuggestFn

with(
local!users: {
touser(
"John"
),
touser(
"James"
),
touser(
"Sally"
)
},
local!userData: fn!difference(
local!users,
ri!selectedUsers
),
local!matches: where(
apply(
search(
ri!searchText,
_
),
local!userData
)
),
a!dataSubset(
data: index(
local!userData,
local!matches
),
identifiers: index(
local!userData,
local!matches
)
)
)

searchText - Text

selectedUsers - User (List)

You can use thi code in save into of custom picker

a!save(
ri!selectedId,
union(save!value, cast(typeof(save!value), {}))
)