FIX active_adapters for transformers models #1975
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Fixes the error reported here: huggingface/transformers#30790 (comment) Unfortunately, transformers models have an active_adapters method but it's 1) not a property and 2) calling it fails because the base model (usually) has no loaded adapter. The base model can be a transformers model for prompt learning, where the base model is not wrapped in a LoraModel or similar. Therefore, this special case needs to be handled separately.
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Fixes the error reported here:
huggingface/transformers#30790 (comment)
Unfortunately, transformers models have an active_adapters method but it's 1) not a property and 2) calling it fails because the base model (usually) has no loaded adapter. The base model can be a transformers model for prompt learning, where the base model is not wrapped in a LoraModel or similar. Therefore, this special case needs to be handled separately.