From 3e86608f89941740fb4f0e58f303b758ff150cdb Mon Sep 17 00:00:00 2001
From: Yurii Purdenko <yurii.purddenko@gmail.com>
Date: Mon, 2 Dec 2024 15:49:22 +0100
Subject: [PATCH] fix

---
 bhtom2/bhtom_common/serializers.py | 42 +++++++++++++++++++++---------
 1 file changed, 30 insertions(+), 12 deletions(-)

diff --git a/bhtom2/bhtom_common/serializers.py b/bhtom2/bhtom_common/serializers.py
index f3028ac..a5f06a6 100644
--- a/bhtom2/bhtom_common/serializers.py
+++ b/bhtom2/bhtom_common/serializers.py
@@ -50,21 +50,39 @@ def get_observatory(self, obj):
 
 
     def get_calibration_data(self, obj):
+    # Fetch the first calibration data record related to the dataproduct
+    cal = Calibration_data.objects.filter(dataproduct=obj).first()
     
-        cal = Calibration_data.objects.get(dataproduct=obj)
+    # Return empty fields if no calibration data exists
+    if not cal:
         return {
-            'id': cal.id or "",
-            'time_photometry': cal.modified or "",
-            'mjd': cal.mjd or "",
-            'calib_survey_filter': f"{cal.use_catalog.survey or ''}/{cal.use_catalog.filters or ''}",
-            'standardised_to': f"{cal.survey or ''}/{cal.best_filter or ''}" if cal.survey and cal.best_filter else "",
-            'magnitude': cal.mag or "",
-            'zp': cal.zeropoint or "",
-            'scatter': cal.scatter or "",
-            'number of datapoints used for calibration': cal.npoints or "",
-            'outlier fraction': cal.outlier_fraction or "",
-            'matching radius[arcsec]': cal.match_distans or ""
+            'id': "",
+            'time_photometry': "",
+            'mjd': "",
+            'calib_survey_filter': "",
+            'standardised_to': "",
+            'magnitude': "",
+            'zp': "",
+            'scatter': "",
+            'number of datapoints used for calibration': "",
+            'outlier fraction': "",
+            'matching radius[arcsec]': ""
         }
+    
+    # Return populated data if calibration data exists
+    return {
+        'id': cal.id or "",
+        'time_photometry': cal.modified or "",
+        'mjd': cal.mjd or "",
+        'calib_survey_filter': f"{cal.use_catalog.survey or ''}/{cal.use_catalog.filters or ''}",
+        'standardised_to': f"{cal.survey or ''}/{cal.best_filter or ''}" if cal.survey and cal.best_filter else "",
+        'magnitude': cal.mag or "",
+        'zp': cal.zeropoint or "",
+        'scatter': cal.scatter or "",
+        'number of datapoints used for calibration': cal.npoints or "",
+        'outlier fraction': cal.outlier_fraction or "",
+        'matching radius[arcsec]': cal.match_distans or ""
+    }