hotfix/fmp-replace-zero: Replace Zero with None in FMP Balance, Cash, Income (#5815)

* replace zeros with None in Balance, Cash, Income

* black

---------

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

openbb_platform/providers/fmp/openbb_fmp/models/balance_sheet.py

@@ -92,6 +92,12 @@ class FMPBalanceSheetData(BalanceSheetData):
         default=None, description="Link to the final statement."
     )
 
+    @model_validator(mode="before")
+    @classmethod
+    def replace_zero(cls, values):  # pylint: disable=no-self-argument
+        """Check for zero values and replace with None."""
+        return {k: None if v == 0 else v for k, v in values.items()}
+
 
 class FMPBalanceSheetFetcher(
     Fetcher[

openbb_platform/providers/fmp/openbb_fmp/models/cash_flow.py

@@ -99,6 +99,12 @@ class FMPCashFlowStatementData(CashFlowStatementData):
         default=None, description="Link to the final statement."
     )
 
+    @model_validator(mode="before")
+    @classmethod
+    def replace_zero(cls, values):  # pylint: disable=no-self-argument
+        """Check for zero values and replace with None."""
+        return {k: None if v == 0 else v for k, v in values.items()}
+
 
 class FMPCashFlowStatementFetcher(
     Fetcher[

openbb_platform/providers/fmp/openbb_fmp/models/income_statement.py

@@ -122,6 +122,12 @@ class FMPIncomeStatementData(IncomeStatementData):
         default=None, description="Final link to the income statement."
     )
 
+    @model_validator(mode="before")
+    @classmethod
+    def replace_zero(cls, values):  # pylint: disable=no-self-argument
+        """Check for zero values and replace with None."""
+        return {k: None if v == 0 else v for k, v in values.items()}
+
 
 class FMPIncomeStatementFetcher(
     Fetcher[