No default for columns output_token_cost_cents and input_token_cost_cents in table language_models

[stephan-buckmaster]

When using my locally hosted model, chats fail with errors because the language_models table has NULLs in the output_token_cost_cents/input_token_cost_cents columns.

This change fixes it:

commit f495dbda7f2b9e6a00a74820dea9656423f80617 (HEAD -> main)
Author: Stephan Wehner <stephan@buckmaster.ca>
Date:   Thu Jan 9 21:09:29 2025 -0800

    Don't crash the app when loanguage model doesn't have cost values

diff --git a/app/models/message.rb b/app/models/message.rb
index f8a01ea..e8ec998 100644
--- a/app/models/message.rb
+++ b/app/models/message.rb
@@ -79,10 +79,18 @@ class Message < ApplicationRecord
   end
 
   def update_input_token_cost
-    self.input_token_cost = assistant.language_model.input_token_cost_cents * input_token_count
+    if assistant.language_model.input_token_cost_cents
+      self.input_token_cost = assistant.language_model.input_token_cost_cents * input_token_count
+    else
+      self.input_token_cost = 0
+    end
   end
 
   def update_output_token_cost
-    self.output_token_cost = assistant.language_model.output_token_cost_cents * output_token_count
+    if assistant.language_model.output_token_cost_cents 
+      self.output_token_cost = assistant.language_model.output_token_cost_cents * output_token_count
+    else
+      self.output_token_cost = 0
+    end
   end
 end```

But a db-migration might be better to set up the default value of 0.

[krschacht]

Thanks for reporting this. I just merged in PR #606 which fixes it.

[stephan-buckmaster]

Ok good, I just added another pull request, realizing the UI wasn't collecting those values:

#607

This also adds a default to the db and validates (presence) in the model