add a possible fix for 'LatentDiffusion' object has no attribute 'lora_layer_mapping'

CHANGELOG.md

@@ -9,6 +9,7 @@
  * allow bf16 in safe unpickler (resolves problems with loading some loras)
  * allow web UI to be ran fully offline
  * fix localizations not working
+ * fix error for loras: 'LatentDiffusion' object has no attribute 'lora_layer_mapping'
 
 ## 1.2.0
 

extensions-builtin/Lora/lora.py

@@ -133,6 +133,10 @@ def load_lora(name, filename):
 
     sd = sd_models.read_state_dict(filename)
 
+    # this should not be needed but is here as an emergency fix for an unknown error people are experiencing in 1.2.0
+    if not hasattr(shared.sd_model, 'lora_layer_mapping'):
+        assign_lora_names_to_compvis_modules(shared.sd_model)
+
     keys_failed_to_match = {}
     is_sd2 = 'model_transformer_resblocks' in shared.sd_model.lora_layer_mapping