feat: Don't write keywords with None values

hydrolib/core/dflowfm/ini/models.py

@@ -3,7 +3,18 @@
 from enum import Enum
 from math import isnan
 from re import compile
-from typing import Any, Callable, List, Literal, Optional, Set, Type, Union
+from typing import (
+    Any,
+    Callable,
+    List,
+    Literal,
+    Optional,
+    Set,
+    Type,
+    Union,
+    get_args,
+    get_origin,
+)
 
 from pydantic.v1 import Extra, Field, root_validator
 from pydantic.v1.class_validators import validator
@@ -206,7 +217,7 @@ def _to_section(
     ) -> Section:
         props = []
         for key, value in self:
-            if key in self._exclude_fields():
+            if not self._should_be_serialized(key, value):
                 continue
 
             field_key = key
@@ -221,6 +232,39 @@ def _to_section(
             props.append(prop)
         return Section(header=self._header, content=props)
 
+    def _should_be_serialized(self, key: str, value: Any) -> bool:
+        if key in self._exclude_fields():
+            return False
+
+        field = self.__fields__.get(key)
+        if not field:
+            return value is not None
+
+        field_type = field.type_
+        if self._is_union(field_type):
+            return value is not None or self._union_has_filemodel(field_type)
+
+        if self._is_list(field_type):
+            field_type = get_args(field_type)[0]
+
+        return self._value_is_not_none_or_type_is_filemodel(field_type, value)
+
+    @staticmethod
+    def _is_union(field_type: type) -> bool:
+        return get_origin(field_type) is Union
+
+    @staticmethod
+    def _union_has_filemodel(field_type: type) -> bool:
+        return any(issubclass(arg, FileModel) for arg in get_args(field_type))
+
+    @staticmethod
+    def _is_list(field_type: type) -> bool:
+        return get_origin(field_type) is List
+
+    @staticmethod
+    def _value_is_not_none_or_type_is_filemodel(field_type: type, value: Any) -> bool:
+        return value is not None or issubclass(field_type, FileModel)
+
 
 Datablock = List[List[Union[float, str]]]
 

hydrolib/core/dflowfm/mdu/models.py

@@ -371,7 +371,7 @@ class Comments(INIBasedModel.Comments):
     maxvelocity: float = Field(0.0, alias="maxVelocity")
     waterlevelwarn: float = Field(0.0, alias="waterLevelWarn")
     tspinupturblogprof: float = Field(0.0, alias="tSpinUpTurbLogProf")
-    fixedweirtopfrictcoef: Optional[float] = Field(None, alias="fixedWeirTopFrictCoef")
+    fixedweirtopfrictcoef: Optional[float] = Field(-999, alias="fixedWeirTopFrictCoef")
     fixedweir1d2d_dx: float = Field(50.0, alias="fixedWeir1D2D_dx")
     junction1d: int = Field(0, alias="junction1D")
     fixedweirtopwidth: float = Field(3.0, alias="fixedWeirTopWidth")
@@ -600,7 +600,7 @@ class Comments(INIBasedModel.Comments):
     idensform: int = Field(2, alias="idensform")
     ag: float = Field(9.81, alias="ag")
     tidalforcing: bool = Field(False, alias="tidalForcing")
-    itcap: Optional[float] = Field(None, alias="ITcap")
+    itcap: Optional[float] = Field(0.0, alias="ITcap")
     doodsonstart: float = Field(55.565, alias="doodsonStart")
     doodsonstop: float = Field(375.575, alias="doodsonStop")
     doodsoneps: float = Field(0.0, alias="doodsonEps")
@@ -649,7 +649,7 @@ class Comments(INIBasedModel.Comments):
     )
 
     _header: Literal["Sediment"] = "Sediment"
-    sedimentmodelnr: Optional[int] = Field(alias="Sedimentmodelnr")
+    sedimentmodelnr: Optional[int] = Field(0, alias="Sedimentmodelnr")
     morfile: DiskOnlyFileModel = Field(
         default_factory=lambda: DiskOnlyFileModel(None), alias="MorFile"
     )
@@ -832,13 +832,13 @@ class Comments(INIBasedModel.Comments):
     dtnodal: float = Field(21600.0, alias="dtNodal")
     dtmax: float = Field(30.0, alias="dtMax")
     dtinit: float = Field(1.0, alias="dtInit")
-    autotimestep: Optional[int] = Field(None, alias="autoTimestep")
+    autotimestep: Optional[int] = Field(1, alias="autoTimestep")
     autotimestepnostruct: bool = Field(False, alias="autoTimestepNoStruct")
     autotimestepnoqout: bool = Field(True, alias="autoTimestepNoQout")
     tstart: float = Field(0.0, alias="tStart")
     tstop: float = Field(86400.0, alias="tStop")
-    startdatetime: Optional[str] = Field(None, alias="startDateTime")
-    stopdatetime: Optional[str] = Field(None, alias="stopDateTime")
+    startdatetime: Optional[str] = Field("", alias="startDateTime")
+    stopdatetime: Optional[str] = Field("", alias="stopDateTime")
     updateroughnessinterval: float = Field(86400.0, alias="updateRoughnessInterval")
     dtfacmax: float = Field(1.1, alias="Dtfacmax")
 
@@ -877,7 +877,7 @@ class Comments(INIBasedModel.Comments):
     restartfile: DiskOnlyFileModel = Field(
         default_factory=lambda: DiskOnlyFileModel(None), alias="restartFile"
     )
-    restartdatetime: Optional[str] = Field(None, alias="restartDateTime")
+    restartdatetime: Optional[str] = Field("", alias="restartDateTime")
 
     @validator("restartdatetime")
     def _validate_datetime(cls, value, field):
@@ -991,10 +991,10 @@ class Comments(INIBasedModel.Comments):
 
     _header: Literal["Trachytopes"] = "Trachytopes"
     trtrou: str = Field("N", alias="trtRou")  # TODO bool
-    trtdef: Optional[Path] = Field(None, alias="trtDef")
-    trtl: Optional[Path] = Field(None, alias="trtL")
+    trtdef: Optional[Path] = Field("", alias="trtDef")
+    trtl: Optional[Path] = Field("", alias="trtL")
     dttrt: float = Field(60.0, alias="dtTrt")
-    trtmxr: Optional[int] = Field(None, alias="trtMxR")
+    trtmxr: Optional[int] = Field(8, alias="trtMxR")
 
 
 ObsFile = Union[XYNModel, ObservationPointModel]
@@ -1532,8 +1532,8 @@ class Comments(INIBasedModel.Comments):
     wrishp_enc: bool = Field(False, alias="wrishp_enc")
     wrishp_src: bool = Field(False, alias="wrishp_src")
     wrishp_pump: bool = Field(False, alias="wrishp_pump")
-    outputdir: Optional[Path] = Field(None, alias="outputDir")
-    waqoutputdir: Optional[Path] = Field(None, alias="waqOutputDir")
+    outputdir: Optional[Path] = Field("", alias="outputDir")
+    waqoutputdir: Optional[Path] = Field("", alias="waqOutputDir")
     flowgeomfile: DiskOnlyFileModel = Field(
         default_factory=lambda: DiskOnlyFileModel(None), alias="flowGeomFile"
     )
@@ -1822,7 +1822,10 @@ class Comments(INIBasedModel.Comments):
         partitionfile: Optional[str] = Field(
             "<*_part.pol>, polyline(s) x, y.", alias="partitionFile"
         )
-        uniformwidth1d: Optional[str] = Field(None, alias="uniformWidth1D")
+        uniformwidth1d: Optional[str] = Field(
+            "Uniform width for channel profiles not specified by profloc",
+            alias="uniformWidth1D",
+        )
         dxwuimin2d: Optional[str] = Field(
             "Smallest fraction dx/wu , set dx > Dxwuimin2D*wu",
             alias="dxWuiMin2D",
@@ -2060,9 +2063,9 @@ class Comments(INIBasedModel.Comments):
     numtopsig: int = Field(0, alias="numTopSig")
     numtopsiguniform: bool = Field(True, alias="numTopSigUniform")
     sigmagrowthfactor: float = Field(1.0, alias="sigmaGrowthFactor")
-    dztop: Optional[float] = Field(None, alias="dzTop")
-    floorlevtoplay: Optional[float] = Field(None, alias="floorLevTopLay")
-    dztopuniabovez: Optional[float] = Field(None, alias="dzTopUniAboveZ")
+    dztop: Optional[float] = Field(-999, alias="dzTop")
+    floorlevtoplay: Optional[float] = Field(-999, alias="floorLevTopLay")
+    dztopuniabovez: Optional[float] = Field(-999, alias="dzTopUniAboveZ")
     keepzlayeringatbed: int = Field(2, alias="keepZLayeringAtBed")
     dxdoubleat1dendnodes: bool = Field(True, alias="dxDoubleAt1DEndNodes")
     changevelocityatstructures: bool = Field(False, alias="changeVelocityAtStructures")
@@ -2167,12 +2170,17 @@ class GroundWater(INIBasedModel):
     """
 
     class Comments(INIBasedModel.Comments):
-        groundwater: Optional[str] = Field(None, alias="GroundWater")
+        groundwater: Optional[str] = Field(
+            "0=No (horizontal) groundwater flow, 1=With groundwater flow",
+            alias="GroundWater",
+        )
         infiltrationmodel: Optional[str] = Field(
             "Infiltration method (0: No infiltration, 1: Interception layer, 2: Constant infiltration capacity, 3: model unsaturated/saturated (with grw), 4: Horton).",
             alias="Infiltrationmodel",
         )
-        hinterceptionlayer: Optional[str] = Field(None, alias="Hinterceptionlayer")
+        hinterceptionlayer: Optional[str] = Field(
+            "Intercept this amount of rain (m)", alias="Hinterceptionlayer"
+        )
         unifinfiltrationcapacity: Optional[str] = Field(
             "Uniform maximum infiltration capacity [m/s].",
             alias="UnifInfiltrationCapacity",
@@ -2204,15 +2212,15 @@ class Comments(INIBasedModel.Comments):
     infiltrationmodel: Optional[InfiltrationMethod] = Field(
         InfiltrationMethod.NoInfiltration, alias="Infiltrationmodel"
     )
-    hinterceptionlayer: Optional[float] = Field(None, alias="Hinterceptionlayer")
+    hinterceptionlayer: Optional[float] = Field(0.0, alias="Hinterceptionlayer")
     unifinfiltrationcapacity: Optional[float] = Field(
         0.0, alias="UnifInfiltrationCapacity"
     )
     conductivity: Optional[float] = Field(0.0, alias="Conductivity")
     h_aquiferuni: Optional[float] = Field(20.0, alias="h_aquiferuni")
-    bgrwuni: Optional[float] = Field(None, alias="bgrwuni")
+    bgrwuni: Optional[float] = Field(-999, alias="bgrwuni")
     h_unsatini: Optional[float] = Field(0.2, alias="h_unsatini")
-    sgrwini: Optional[float] = Field(None, alias="sgrwini")
+    sgrwini: Optional[float] = Field(-999, alias="sgrwini")
 
 
 class ProcessFluxIntegration(IntEnum):
@@ -2255,7 +2263,6 @@ class Comments(INIBasedModel.Comments):
             "Waq processes time step [s]. Must be a multiple of DtUser. If DtProcesses is negative, water quality processes are calculated with every hydrodynamic time step.",
             alias="DtProcesses",
         )
-        dtmassbalance: Optional[str] = Field(None, alias="DtMassBalance")
         processfluxintegration: Optional[str] = Field(
             "Process fluxes integration option (1: WAQ, 2: D-Flow FM).",
             alias="ProcessFluxIntegration",
@@ -2293,7 +2300,6 @@ class Comments(INIBasedModel.Comments):
     )
     thetavertical: Optional[float] = Field(0.0, alias="ThetaVertical")
     dtprocesses: Optional[float] = Field(0.0, alias="DtProcesses")
-    dtmassbalance: Optional[float] = Field(0.0, alias="DtMassBalance")
     processfluxintegration: Optional[ProcessFluxIntegration] = Field(
         ProcessFluxIntegration.WAQ, alias="ProcessFluxIntegration"
     )

tests/data/input/dflowfm_individual_files/with_optional_sections.mdu

@@ -384,7 +384,6 @@ AdditionalHistoryOutputFile               =                     # extra history
 StatisticsFile                            =                     # statistics file
 ThetaVertical                             = 0.                  # theta vertical for waq
 DtProcesses                               = 0.                  # waq processes time step
-DtMassBalance                             = 0.                  # waq mass balance output time step
 ProcessFluxIntegration                    = 1                   # Process fluxes integration option (1: WAQ, 2: D-Flow FM)
 Wriwaqbot3Doutput                         = 0                   # Write 3D water quality bottom variables (1: yes, 0: no)
 VolumeDryThreshold                        = 1.d-3

tests/data/reference/fm/special_3d_settings.mdu

@@ -7,7 +7,6 @@ program               = D-Flow FM     # Program
 version               = 1.2.100.66357 # Version number of computational kernel
 autoStart             = 0             # Autostart simulation after loading MDU or not (0=no, 1=autostart, 2=autostartstop).
 pathsRelativeToParent = 0             # Default: 0. Whether or not (1/0) to resolve file names (e.g. inside the *.ext file) relative to their direct parent, instead of to the toplevel MDU working dir.
-guiVersion            =               # DeltaShell FM suite version.
 
 [Geometry]
 netFile                        = SEA_coarse_net.nc # Unstructured grid file *_net.nc
@@ -32,7 +31,7 @@ profDefFile                    =                   # <*_profdefinition.def>) def
 profDefXyzFile                 =                   # <*_profdefinition.def>) definition for all profile nrs.
 manholeFile                    =                   # File containing manholes (e.g. <*.dat>).
 partitionFile                  =                   # <*_part.pol>, polyline(s) x, y.
-uniformWidth1D                 = 2.0
+uniformWidth1D                 = 2.0               # Uniform width for channel profiles not specified by profloc
 dxWuiMin2D                     = 0.1               # Smallest fraction dx/wu , set dx > Dxwuimin2D*wu, Default = 0.1
 waterLevIni                    = 0.0               # Initial water level at missing s0 values
 bedLevUni                      = 5.0               # Uniform bed level used at missing z values if BedlevType > 2
@@ -197,9 +196,9 @@ secondaryFlow              = 0       # Secondary flow (0: no, 1: yes)
 betaSpiral                 = 0.0     # Weight factor of the spiral flow intensity on flow dispersion stresses (0d0 = disabled).
 
 [Sediment]
-Sedimentmodelnr =  # Sediment model nr, (0=no, 1=Krone, 2=SvR2007, 3=E-H, 4=MorphologyModule).
-MorFile         =  # Morphology settings file (*.mor)
-SedFile         =  # Sediment characteristics file (*.sed)
+Sedimentmodelnr = 0 # Sediment model nr, (0=no, 1=Krone, 2=SvR2007, 3=E-H, 4=MorphologyModule).
+MorFile         =   # Morphology settings file (*.mor)
+SedFile         =   # Sediment characteristics file (*.sed)
 
 [Wind]
 iCdTyp               = 4         # Wind drag coefficient type (1=Const; 2=Smith&Banke (2 pts); 3=S&B (3 pts); 4=Charnock 1955, 5=Hwang 2005, 6=Wuest 2005, 7=Hersbach 2010 (2 pts)
@@ -238,9 +237,6 @@ restartDateTime =  # Restart date and time (yyyymmddhhmmss) when restarting from
 [External Forcing]
 extForceFile    = SEA_3D_3km_spatial.ext # Old format for external forcings file *.ext, link with tim/cmp-format boundary conditions specification
 extForceFileNew =                        # New format for external forcings file *.ext, link with bc-format boundary conditions specification
-rainfall        =                        # Include rainfall, (0=no, 1=yes).
-qExt            =                        # Include user Qin/out, externally provided, (0=no, 1=yes).
-evaporation     =                        # Include evaporation in water balance, (0=no, 1=yes).
 windExt         = 1                      # Include wind, externally provided, (0=no, 1=reserved for EC, 2=yes)
 
 [Hydrology]

tests/dflowfm/ini/test_ini.py

@@ -1,10 +1,11 @@
 import inspect
 from itertools import chain
-from typing import Iterable, List, Optional, Sequence, Tuple, Union
+from typing import Iterable, List, Optional, Union
 
 import pytest
-from pydantic.v1 import ValidationError
+from pydantic.v1 import Field, ValidationError
 
+from hydrolib.core.basemodel import FileModel, ModelSaveSettings
 from hydrolib.core.dflowfm.ini.io_models import (
     CommentBlock,
     ContentElement,
@@ -13,6 +14,7 @@
     Property,
     Section,
 )
+from hydrolib.core.dflowfm.ini.models import INIBasedModel
 from hydrolib.core.dflowfm.ini.parser import (
     Parser,
     ParserConfig,
@@ -1696,6 +1698,38 @@ def test_deserialize_serialize_should_give_the_same_result(self):
 
         assert result == input_str
 
+    def test_non_filemodel_keyword_with_none_value_does_not_get_added_to_section(self):
+        class TestINIBasedModel(INIBasedModel):
+            random_property: str = Field(None)
+
+        config = INISerializerConfig()
+        settings = ModelSaveSettings()
+        model = TestINIBasedModel()
+
+        section = model._to_section(config, settings)
+
+        assert len(section.content) == 0
+
+    def test_filemodel_keyword_with_none_value_does_get_added_to_section(self):
+        class TestINIBasedModel(INIBasedModel):
+            random_property: FileModel = Field(None)
+            random_property2: Union[FileModel, str] = Field(None)
+            random_property3: List[FileModel] = Field(None)
+
+        config = INISerializerConfig()
+        settings = ModelSaveSettings()
+        model = TestINIBasedModel()
+
+        section = model._to_section(config, settings)
+
+        assert len(section.content) == 3
+        assert section.content[0].key == "random_property"
+        assert section.content[0].value == ""
+        assert section.content[1].key == "random_property2"
+        assert section.content[1].value == ""
+        assert section.content[2].key == "random_property3"
+        assert section.content[2].value == ""
+
 
 def test_serialize_deserialize_should_give_the_same_result():
     document = Document(

tests/dflowfm/test_mdu.py

@@ -111,7 +111,6 @@ def test_mdu_with_optional_sections(self):
         assert fm_model.processes.statisticsfile.filepath is None
         assert fm_model.processes.thetavertical == 0.0
         assert fm_model.processes.dtprocesses == 0.0
-        assert fm_model.processes.dtmassbalance == 0.0
         assert fm_model.processes.processfluxintegration == ProcessFluxIntegration.WAQ
         assert fm_model.processes.wriwaqbot3doutput is False
         assert fm_model.processes.volumedrythreshold == 1e-3

tests/dflowfm/test_research.py

@@ -54,6 +54,32 @@ def test_load_model_with_research_keywords_as_researchfmmodel(self):
         assert model.trachytopes.research_trtmnh == pytest.approx(0.1)
         assert model.output.research_mbainterval == pytest.approx(0.0)
 
+    def test_save_model_with_single_research_keyword_does_not_write_other_research_keywords(
+        self, tmpdir: Path
+    ):
+        model = ResearchFMModel()
+        model.geometry.research_waterdepthini1d = 12.34  # a random research keyword
+
+        save_path = tmpdir / "test.mdu"
+        model.save(filepath=save_path)
+
+        # I picked 5 random research keywords to check
+        keywords_to_check = [
+            "inputspecific",
+            "toplayminthick",
+            "faclaxturb",
+            "surftempsmofac",
+            "mbalumpsourcesinks",
+        ]
+
+        with open(save_path, "r") as file:
+            content = file.read()
+
+        for keyword in keywords_to_check:
+            assert keyword not in content
+
+        assert "waterdepthini1d" in content
+
     def test_can_save_and_load_research_model_from_scratch_without_errors(self):
         file_mdu = Path("mdu.mdu")
         mdu = ResearchFMModel()