9Dave9

9Dave9

Ecto with dates comparison?

Hello,

I have a query, where I’d like to grab all records still in the future.

  def get_scheduled_notification_pushes_from_date(date\\DateTime.utc_now()) do                                                                         
    query = from s in ScheduledPush,                                                                                                                   
      where: s.status not in ["completed", "cancelled"] and s.utc_schedule_time >= ^date                                                               
                                                                                                                                                       
    Repo.all(query)                                                                                                                                    
  end    

I thought that this would possibly get converted or cast for postgres - but it must be doing something weird.

I also tried comparing ~U[] objects.. but that’s a bad idea…

iex(37)> ~U[2020-08-15 20:39:00.000000Z] >= ~U[2020-08-15 20:36:10.367654Z]

warning: invalid comparison with struct literal ~U"2020-08-15 20:39:00.000000Z". Comparison operators (>, <, >=, <=) perform structural and not semantic comparison. Comparing with a struct literal is unlikely to give a meaningful result. Modules typically define a compare/2 function that can be used for semantic comparison

false

How do I look for records based on a value that is ahead of DateTime.utc_now() with Ecto?

The type for utc_schedule_time is utc_datetime_usec

Marked As Solved

al2o3cr

al2o3cr

WHERE (NOT (s0.status IN ('completed','cancelled'))

The problem is the NULL - NULL IN ('completed', 'canceled') doesn’t evaluate to false it evaluates to NULL, and NOT(NULL) is still NULL.

Where Next?

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