Using List<int> array does not work as expected

I created a model as below:

public class ApplicationDbEntity
{
    ...
    public int Id { get; set; }
    public List<int> GroupIds { get; set; }
}

And while doing some queries I realized that Contains was not working properly when using GroupIds field.

The LINQ query looks like this:

dbContext.Applications.Where(x =>
                    dbContext.UserGroupRoleLinks.Where(u => u.UserId == userId).Select(e => e.GroupId).Any(e => x.GroupIds.Contains(e)) &&
                    x.Version == dbContext.Applications.Where(a => a.Id == x.Id).Max(a => a.Version))
                .Select(app => new ApplicationResponse
                {
                    Id = app.Id,
                    ApplicationName = app.ApplicationName,
                    Created = app.Created,
                    Version = app.Version,
                    IsPublished = app.IsPublished,
                    Description = app.Description,
                    DisplayApplicationName = app.DisplayApplicationName
                }).ToListAsync()

And this one result to a query which looks like below:

SELECT a.id AS "Id", a.application_name AS "ApplicationName", a.created AS "Created", a.version AS "Version", a.published AS "IsPublished", a.description AS "Description", a.display_application_name AS "DisplayApplicationName"
FROM applications AS a
WHERE (TRUE = FALSE) AND (a.version = (
    SELECT MAX(a0.version)
    FROM applications AS a0
    WHERE a0.id = a.id))

which is wrong.

After changing the List<int> to int[] started to generate correct queries like below:

SELECT a.id AS "Id", a.application_name AS "ApplicationName", a.created AS "Created", a.version AS "Version", a.published AS "IsPublished", a.description AS "Description", a.display_application_name AS "DisplayApplicationName"
FROM applications AS a
WHERE EXISTS (
    SELECT 1
    FROM users_user_groups_link AS u
    WHERE (u.user_id = @__userId_0) AND u.group_id = ANY (a.groups_id)) AND (a.version = (
    SELECT MAX(a0.version)
    FROM applications AS a0
    WHERE a0.id = a.id))

Had to spend quite some time before I read the documentation in details and to realize that I had to use arrays in c# in order for it to work.

My question is: - is there anyway to throw an exception when using List<T>(when mapping to postgress arrays) instead of generating wrong queries ?

[rajmondburgaj]

hi @roji, sorry for the late response, unfortunately now I can not try this because I don’t want to update all projects to the latest. tried it but had so many other dependency issues(not related to entity framework), but whenever this package is stable I will update as soon as possible and check if this is fixed. If u want u can close the ticket for now, and I will reopen if the same problem persists in the latest stable version.

[roji]

Closing for now, we can revisit later.