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fix: preserve user-selected model when updating available options #9495

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Merged
italojohnny merged 2 commits into from
Aug 22, 2025
Merged

fix: preserve user-selected model when updating available options #9495

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7363c24
fix: preserve user-selected model when updating available options
italojohnny Aug 22, 2025
a68d924
Merge branch 'main' into fix/preserve-model-selection
italojohnny Aug 22, 2025
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3 changes: 2 additions & 1 deletion src/backend/base/langflow/components/anthropic/anthropic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -177,8 +177,9 @@ def update_build_config(self, build_config: dotdict, field_value: Any, field_nam
except (ImportError, ValueError, requests.exceptions.RequestException) as e:
logger.exception(f"Error getting model names: {e}")
ids = ANTHROPIC_MODELS
build_config.setdefault("model_name", {})
build_config["model_name"]["options"] = ids
build_config["model_name"]["value"] = ids[0]
build_config["model_name"].setdefault("value", ids[0])
build_config["model_name"]["combobox"] = True
Comment on lines +180 to 183
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@coderabbitai coderabbitai bot Aug 22, 2025

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⚠️ Potential issue

Prevent IndexError when no models are returned

ids can be empty after filtering tool-capable models or due to API/listing issues. Accessing ids[0] will raise IndexError. Guard it.

Apply this diff:

-                build_config.setdefault("model_name", {})
-                build_config["model_name"]["options"] = ids
-                build_config["model_name"].setdefault("value", ids[0])
+                model_cfg = build_config.setdefault("model_name", {})
+                model_cfg["options"] = ids
+                if ids:
+                    model_cfg.setdefault("value", ids[0])
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
build_config.setdefault("model_name", {})
build_config["model_name"]["options"] = ids
build_config["model_name"]["value"] = ids[0]
build_config["model_name"].setdefault("value", ids[0])
build_config["model_name"]["combobox"] = True
model_cfg = build_config.setdefault("model_name", {})
model_cfg["options"] = ids
if ids:
model_cfg.setdefault("value", ids[0])
build_config["model_name"]["combobox"] = True
🤖 Prompt for AI Agents 
In src/backend/base/langflow/components/anthropic/anthropic.py around lines 180
to 183, the code unconditionally does
build_config["model_name"].setdefault("value", ids[0]) which will raise
IndexError if ids is empty; change this to first set
build_config["model_name"]["options"] = ids, then set the default value to
ids[0] only when ids is non-empty otherwise set a safe fallback (e.g. an empty
string or None) and keep combobox behavior; in short, guard the access to ids[0]
with an if ids: ... else: ... and assign a sensible default value when ids is
empty.

except Exception as e:
msg = f"Error getting model names: {e}"
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3 changes: 2 additions & 1 deletion src/backend/base/langflow/components/google/google_generative_ai.py
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Original file line number Diff line number Diff line change
Expand Up @@ -145,8 +145,9 @@ def update_build_config(self, build_config: dotdict, field_value: Any, field_nam
except (ImportError, ValueError, requests.exceptions.RequestException) as e:
logger.exception(f"Error getting model names: {e}")
ids = GOOGLE_GENERATIVE_AI_MODELS
build_config.setdefault("model_name", {})
build_config["model_name"]["options"] = ids
build_config["model_name"]["value"] = ids[0]
build_config["model_name"].setdefault("value", ids[0])
except Exception as e:
Comment on lines +148 to 151
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@coderabbitai coderabbitai bot Aug 22, 2025

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⚠️ Potential issue

Avoid IndexError when ids is empty

ids[0] will throw if the list is empty (e.g., transient API issues or filtering). Add a guard.

Apply this diff:

-                build_config.setdefault("model_name", {})
-                build_config["model_name"]["options"] = ids
-                build_config["model_name"].setdefault("value", ids[0])
+                model_cfg = build_config.setdefault("model_name", {})
+                model_cfg["options"] = ids
+                if ids:
+                    model_cfg.setdefault("value", ids[0])
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
build_config.setdefault("model_name", {})
build_config["model_name"]["options"] = ids
build_config["model_name"]["value"] = ids[0]
build_config["model_name"].setdefault("value", ids[0])
except Exception as e:
model_cfg = build_config.setdefault("model_name", {})
model_cfg["options"] = ids
if ids:
model_cfg.setdefault("value", ids[0])
🤖 Prompt for AI Agents 
In src/backend/base/langflow/components/google/google_generative_ai.py around
lines 148-151, the code accesses ids[0] without checking that ids is non-empty
which can raise IndexError; ensure you guard against an empty ids list by
checking if ids and setting build_config["model_name"]["value"] only when ids
has at least one element, otherwise set a safe fallback (e.g., None or an empty
string) or omit the "value" key and optionally log a warning/error so transient
API or filtering yielding an empty list does not crash the process.

msg = f"Error getting model names: {e}"
raise ValueError(msg) from e
Expand Down
3 changes: 2 additions & 1 deletion src/backend/base/langflow/components/groq/groq.py
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Original file line number Diff line number Diff line change
Expand Up @@ -114,8 +114,9 @@ def update_build_config(self, build_config: dict, field_value: str, field_name:
except (ImportError, ValueError, requests.exceptions.RequestException) as e:
logger.exception(f"Error getting model names: {e}")
ids = GROQ_MODELS
build_config.setdefault("model_name", {})
build_config["model_name"]["options"] = ids
build_config["model_name"]["value"] = ids[0]
build_config["model_name"].setdefault("value", ids[0])
except Exception as e:
Comment on lines +117 to 120
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@coderabbitai coderabbitai bot Aug 22, 2025

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⚠️ Potential issue

Guard against empty ids to avoid IndexError

ids can be empty (e.g., transient API failure or aggressive filtering when tool_model_enabled is True). Accessing ids[0] will raise IndexError even inside setdefault. Add a simple guard.

Apply this diff:

-                    build_config.setdefault("model_name", {})
-                    build_config["model_name"]["options"] = ids
-                    build_config["model_name"].setdefault("value", ids[0])
+                    model_cfg = build_config.setdefault("model_name", {})
+                    model_cfg["options"] = ids
+                    if ids:
+                        model_cfg.setdefault("value", ids[0])
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
build_config.setdefault("model_name", {})
build_config["model_name"]["options"] = ids
build_config["model_name"]["value"] = ids[0]
build_config["model_name"].setdefault("value", ids[0])
except Exception as e:
model_cfg = build_config.setdefault("model_name", {})
model_cfg["options"] = ids
if ids:
model_cfg.setdefault("value", ids[0])
except Exception as e:
🤖 Prompt for AI Agents 
In src/backend/base/langflow/components/groq/groq.py around lines 117 to 120,
the code unconditionally sets build_config["model_name"]["options"] = ids and
build_config["model_name"].setdefault("value", ids[0]) which will raise
IndexError when ids is empty; add a guard that checks if ids is truthy before
setting "options" and using ids[0] — if ids is empty, set "options" to an empty
list (or omit it) and set "value" to None or a sensible default, or skip those
assignments entirely; ensure this check is inside the same try/except block so
transient failures won't cause an IndexError.

msg = f"Error getting model names: {e}"
raise ValueError(msg) from e
Expand Down