修改全能创作发现问题

core/backend/apps/ai/services.py

@@ -54,11 +54,61 @@ logger = logging.getLogger(__name__)
 OFFICIAL_DIRECT_PROVIDERS = {"volcengine", "volcano", "ark", "volcano_ark", "doubao"}
 
 
+SEED_21_PRO_NAME = "doubao-seed-2-1-pro-260628"
+
+
+def is_retired_text_model(model) -> bool:
+    """DeepSeek / DP V4 Pro 已停用,解析层一律跳过。"""
+    blob = f"{getattr(model, 'name', '')} {getattr(model, 'display_name', '')}".lower()
+    return "deepseek" in blob or "dp v4" in blob or "dp-v4" in blob
+
+
+def get_seed_text_model() -> ModelConfig | None:
+    qs = (
+        ModelConfig.objects.select_related("provider")
+        .filter(
+            capability=ModelConfig.Capability.TEXT,
+            status=ModelConfig.Status.ACTIVE,
+            provider__status="active",
+        )
+    )
+    return (
+        qs.filter(name=SEED_21_PRO_NAME).first()
+        or qs.filter(name__startswith="doubao-seed-2-1-pro").first()
+        or qs.filter(name__startswith="doubao-seed-2-0-pro").first()
+    )
+
+
+def resolve_text_model(requested: ModelConfig | None = None, requested_id=None) -> ModelConfig | None:
+    """文本模型入口:用户选了 DeepSeek 也改走 Seed 2.1 Pro。"""
+    model = requested
+    if model is None and requested_id:
+        model = (
+            ModelConfig.objects.select_related("provider")
+            .filter(id=requested_id, capability=ModelConfig.Capability.TEXT, status=ModelConfig.Status.ACTIVE)
+            .first()
+        )
+    if model is not None and not is_retired_text_model(model):
+        return model
+    return get_default_model(ModelConfig.Capability.TEXT)
+
+
 def get_default_model(capability: str) -> ModelConfig:
     qs = (
         ModelConfig.objects.select_related("provider")
         .filter(capability=capability, status=ModelConfig.Status.ACTIVE, provider__status="active")
     )
+    if capability == ModelConfig.Capability.TEXT:
+        for model in qs.filter(is_default=True).order_by("created_at"):
+            if not is_retired_text_model(model):
+                return model
+        seed = get_seed_text_model()
+        if seed is not None:
+            return seed
+        for model in qs.order_by("created_at"):
+            if not is_retired_text_model(model):
+                return model
+        return None
     # 优先平台超管钦定的默认模型;未钦定则回落「最早创建的 active」(原行为,零回归)
     return qs.filter(is_default=True).order_by("created_at").first() or qs.order_by("created_at").first()