fixed empty plots, updated filters

utils.py

@@ -751,8 +751,6 @@ class QualtricsSurvey(QualtricsPlotsMixin):
         self.filter_ethnicity:list = None
         self.filter_income:list = None
         self.filter_business_owner:list = None      # QID4
-        self.filter_employment_status:list = None   # QID13
-        self.filter_personal_products:list = None   # QID14
         self.filter_ai_user:list = None             # QID22
         self.filter_investable_assets:list = None   # QID16
         self.filter_industry:list = None            # QID17
@@ -844,8 +842,6 @@ class QualtricsSurvey(QualtricsPlotsMixin):
         self.options_ethnicity = sorted(df['QID3'].drop_nulls().unique().to_list()) if 'QID3' in df.columns else []
         self.options_income = sorted(df['QID15'].drop_nulls().unique().to_list()) if 'QID15' in df.columns else []
         self.options_business_owner = sorted(df['QID4'].drop_nulls().unique().to_list()) if 'QID4' in df.columns else []
-        self.options_employment_status = sorted(df['QID13'].drop_nulls().unique().to_list()) if 'QID13' in df.columns else []
-        self.options_personal_products = sorted(df['QID14'].drop_nulls().unique().to_list()) if 'QID14' in df.columns else []
         self.options_ai_user = sorted(df['QID22'].drop_nulls().unique().to_list()) if 'QID22' in df.columns else []
         self.options_investable_assets = sorted(df['QID16'].drop_nulls().unique().to_list()) if 'QID16' in df.columns else []
         self.options_industry = sorted(df['QID17'].drop_nulls().unique().to_list()) if 'QID17' in df.columns else []
@@ -865,7 +861,7 @@ class QualtricsSurvey(QualtricsPlotsMixin):
         
         return q.select(QIDs).rename(rename_dict)
 
-    def filter_data(self, q: pl.LazyFrame, age:list=None, gender:list=None, consumer:list=None, ethnicity:list=None, income:list=None, business_owner:list=None, employment_status:list=None, personal_products:list=None, ai_user:list=None, investable_assets:list=None, industry:list=None) -> pl.LazyFrame:
+    def filter_data(self, q: pl.LazyFrame, age:list=None, gender:list=None, consumer:list=None, ethnicity:list=None, income:list=None, business_owner:list=None, ai_user:list=None, investable_assets:list=None, industry:list=None) -> pl.LazyFrame:
         """Filter data based on provided parameters
         
         Possible parameters:
@@ -875,8 +871,6 @@ class QualtricsSurvey(QualtricsPlotsMixin):
         - ethnicity: list (QID3)
         - income: list (QID15)
         - business_owner: list (QID4)
-        - employment_status: list (QID13)
-        - personal_products: list (QID14)
         - ai_user: list (QID22)
         - investable_assets: list (QID16)
         - industry: list (QID17)
@@ -884,49 +878,41 @@ class QualtricsSurvey(QualtricsPlotsMixin):
         Also saves the result to self.data_filtered.
         """
         
-        # Apply filters
+        # Apply filters - skip if empty list (columns with all NULLs produce empty options)
         self.filter_age = age
-        if age is not None:
+        if age is not None and len(age) > 0:
             q = q.filter(pl.col('QID1').is_in(age))
         
         self.filter_gender = gender
-        if gender is not None:
+        if gender is not None and len(gender) > 0:
             q = q.filter(pl.col('QID2').is_in(gender))
         
         self.filter_consumer = consumer
-        if consumer is not None:
+        if consumer is not None and len(consumer) > 0:
             q = q.filter(pl.col('Consumer').is_in(consumer))
         
         self.filter_ethnicity = ethnicity
-        if ethnicity is not None:
+        if ethnicity is not None and len(ethnicity) > 0:
             q = q.filter(pl.col('QID3').is_in(ethnicity))
         
         self.filter_income = income
-        if income is not None:
+        if income is not None and len(income) > 0:
             q = q.filter(pl.col('QID15').is_in(income))
         
         self.filter_business_owner = business_owner
-        if business_owner is not None:
+        if business_owner is not None and len(business_owner) > 0:
             q = q.filter(pl.col('QID4').is_in(business_owner))
         
-        self.filter_employment_status = employment_status
-        if employment_status is not None:
-            q = q.filter(pl.col('QID13').is_in(employment_status))
-        
-        self.filter_personal_products = personal_products
-        if personal_products is not None:
-            q = q.filter(pl.col('QID14').is_in(personal_products))
-        
         self.filter_ai_user = ai_user
-        if ai_user is not None:
+        if ai_user is not None and len(ai_user) > 0:
             q = q.filter(pl.col('QID22').is_in(ai_user))
         
         self.filter_investable_assets = investable_assets
-        if investable_assets is not None:
+        if investable_assets is not None and len(investable_assets) > 0:
             q = q.filter(pl.col('QID16').is_in(investable_assets))
         
         self.filter_industry = industry
-        if industry is not None:
+        if industry is not None and len(industry) > 0:
             q = q.filter(pl.col('QID17').is_in(industry))
         
         self.data_filtered = q