修改打印逻辑，先找默认打印机，未找到则直接返回

jikimo_printing/models/jikimo_printing.py

@@ -17,6 +17,11 @@ class JikimoPrinting(models.AbstractModel):
         """
             打印二维码
         """
+        printer = self.env['printing.printer'].get_default()
+        if not printer:
+            _logger.error("未找到默认打印机")
+            return
+
         # 生成二维码
         qr = qrcode.QRCode(version=1, box_size=10, border=5)
         qr.add_data(data)
@@ -45,8 +50,7 @@ class JikimoPrinting(models.AbstractModel):
 
         # 获取PDF内容并打印
         pdf_content = pdf_buffer.getvalue()
-        printer = self.env['printing.printer'].get_default()
-        _logger.info(f"打印内容: {pdf_content}")
+        # _logger.info(f"打印内容: {pdf_content}")
         printer.print_document(report=None, content=pdf_content, doc_format='pdf')
 
         # 清理资源
@@ -57,6 +61,11 @@ class JikimoPrinting(models.AbstractModel):
         """
             打印PDF
         """
+        printer = self.env['printing.printer'].get_default()
+        if not printer:
+            _logger.error("未找到默认打印机")
+            return
+
         _logger.info("PDF打印开始")
 
         pdf_data_str = pdf_data.decode('ascii', errors='ignore')
@@ -71,12 +80,6 @@ class JikimoPrinting(models.AbstractModel):
         pdf_content = pdf_buffer.getvalue()
         _logger.info(f"处理后的内容前20字节: {pdf_content[:20]}")
         
-        # 获取默认打印机
-        printer = self.env['printing.printer'].get_default()
-        if not printer:
-            _logger.error("未找到默认打印机")
-            return
-        
         printer.print_document(report=None, content=pdf_content, doc_format='pdf')
         # 清理资源
         pdf_buffer.close()