diff --git a/src/pytestpavement/labtests/sheartest.py b/src/pytestpavement/labtests/sheartest.py
index 13718fc..21332cd 100644
--- a/src/pytestpavement/labtests/sheartest.py
+++ b/src/pytestpavement/labtests/sheartest.py
@@ -208,6 +208,8 @@ class ShearTestExtension(ShearTest):
                     #
                     **values).save()
             except:
+                print('error saving data')
+                raise
                 rdata.delete()
 
     def _set_parameter(self):
diff --git a/src/pytestpavement/models/sheartest.py b/src/pytestpavement/models/sheartest.py
index d17fc23..f6639cc 100644
--- a/src/pytestpavement/models/sheartest.py
+++ b/src/pytestpavement/models/sheartest.py
@@ -46,47 +46,48 @@ class DynamicShearTest(Document):
 class DynamicShearTestExtension(DynamicShearTest):
 
     #metadata
-    f = FloatField()
-    sigma_normal = FloatField()
-    T = FloatField()
-    extension = FloatField()
+    f = FloatField(required=True)
+    sigma_normal = FloatField(required=True)
+    T = FloatField(required=True)
+    extension = FloatField(required=True)
 
     #results
     data = LazyReferenceField(DataSheartest,
                               required=True,
                               reverse_delete_rule=CASCADE)
 
-    stiffness = FloatField()
+    stiffness = FloatField(required=True)
+    bruch = BooleanField(required=True)
     #fit parameter
     ## F
-    fit_amp_F = FloatField()
-    fit_freq_F = FloatField()
-    fit_phase_F = FloatField()
-    fit_offset_F = FloatField()
-    fit_slope_F = FloatField()
+    fit_amp_F = FloatField(required=True)
+    fit_freq_F = FloatField(required=True)
+    fit_phase_F = FloatField(required=True)
+    fit_offset_F = FloatField(required=True)
+    fit_slope_F = FloatField(required=True)
     ## S1
-    fit_amp_s_vert_1 = FloatField()
-    fit_freq_s_vert_1 = FloatField()
-    fit_phase_s_vert_1 = FloatField()
-    fit_offset_s_vert_1 = FloatField()
-    fit_slope_s_vert_1 = FloatField()
-    r2_s_vert_1 = FloatField()
+    fit_amp_s_vert_1 = FloatField(required=True)
+    fit_freq_s_vert_1 = FloatField(required=True)
+    fit_phase_s_vert_1 = FloatField(required=True)
+    fit_offset_s_vert_1 = FloatField(required=True)
+    fit_slope_s_vert_1 = FloatField(required=True)
+    r2_s_vert_1 = FloatField(required=True)
     ## S2
-    fit_amp_s_vert_2 = FloatField()
-    fit_freq_s_vert_2 = FloatField()
-    fit_phase_s_vert_2 = FloatField()
-    fit_offset_s_vert_2 = FloatField()
-    fit_slope_s_vert_2 = FloatField()
-    r2_s_vert_2 = FloatField()
+    fit_amp_s_vert_2 = FloatField(required=True)
+    fit_freq_s_vert_2 = FloatField(required=True)
+    fit_phase_s_vert_2 = FloatField(required=True)
+    fit_offset_s_vert_2 = FloatField(required=True)
+    fit_slope_s_vert_2 = FloatField(required=True)
+    r2_s_vert_2 = FloatField(required=True)
     ## S-Sum
-    fit_amp_s_vert_sum = FloatField()
-    fit_freq_s_vert_sum = FloatField()
-    fit_phase_s_vert_sum = FloatField()
-    fit_offset_s_vert_sum = FloatField()
-    fit_slope_s_vert_sum = FloatField()
-    r2_s_vert_sum = FloatField()
+    fit_amp_s_vert_sum = FloatField(required=True)
+    fit_freq_s_vert_sum = FloatField(required=True)
+    fit_phase_s_vert_sum = FloatField(required=True)
+    fit_offset_s_vert_sum = FloatField(required=True)
+    fit_slope_s_vert_sum = FloatField(required=True)
+    r2_s_vert_sum = FloatField(required=True)
     ## r2
-    r2_F = FloatField()
-    r2_s_vert_1 = FloatField()
-    r2_s_vert_2 = FloatField()
-    r2_s_vert_sum = FloatField()
+    r2_F = FloatField(required=True)
+    r2_s_vert_1 = FloatField(required=True)
+    r2_s_vert_2 = FloatField(required=True)
+    r2_s_vert_sum = FloatField(required=True)