feat: add support for step

src/npm-fastui/src/components/FormField.tsx

@@ -24,7 +24,7 @@ interface FormFieldInputProps extends FormFieldInput {
 }
 
 export const FormFieldInputComp: FC<FormFieldInputProps> = (props) => {
-  const { name, placeholder, required, htmlType, locked, autocomplete, onChange } = props
+  const { name, placeholder, required, htmlType, locked, autocomplete, onChange, step } = props
 
   return (
     <div className={useClassName(props)}>
@@ -39,6 +39,7 @@ export const FormFieldInputComp: FC<FormFieldInputProps> = (props) => {
         disabled={locked}
         placeholder={placeholder}
         autoComplete={autocomplete}
+        step={step}
         aria-describedby={descId(props)}
         onChange={onChange}
       />

src/npm-fastui/src/models.d.ts

@@ -433,6 +433,7 @@ export interface FormFieldInput {
   initial?: string | number
   placeholder?: string
   autocomplete?: string
+  step?: number | 'any'
   type: 'FormFieldInput'
 }
 /**

src/python-fastui/fastui/components/forms.py

@@ -58,6 +58,9 @@ class FormFieldInput(BaseFormField):
     autocomplete: _t.Union[str, None] = None
     """Autocomplete value for the field."""
 
+    step: _t.Union[float, _t.Literal['any'], None] = None
+    """Step value for the field."""
+
     type: _t.Literal['FormFieldInput'] = 'FormFieldInput'
     """The type of the component. Always 'FormFieldInput'."""
 

src/python-fastui/fastui/json_schema.py

@@ -198,6 +198,7 @@ def json_schema_field_to_field(
             autocomplete=schema.get('autocomplete'),
             description=schema.get('description'),
             placeholder=schema.get('placeholder'),
+            step=schema.get('step', _get_default_step(schema)),
         )
 
 
@@ -373,6 +374,14 @@ def input_html_type(schema: JsonSchemaField) -> InputHtmlType:
         raise ValueError(f'Unknown schema: {schema}') from e
 
 
+def _get_default_step(schema: JsonSchemaField) -> _t.Union[_t.Literal['any'], None]:
+    key = schema['type']
+    if key == 'integer':
+        return None
+    if key == 'number':
+        return 'any'
+
+
 def schema_is_field(schema: JsonSchemaConcrete) -> _ta.TypeGuard[JsonSchemaField]:
     """
     Determine if a schema is a field `JsonSchemaField`

src/python-fastui/tests/test_forms.py

@@ -547,3 +547,47 @@ def test_form_fields():
         'submitUrl': '/foobar/',
         'type': 'ModelForm',
     }
+
+
+class FormNumbersDefaultStep(BaseModel):
+    size: int
+    cost: float
+    fees: float = Field(json_schema_extra={'step': '0.01'})
+
+
+def test_form_numbers_default_step():
+    m = components.ModelForm(model=FormNumbersDefaultStep, submit_url='/foobar')
+
+    assert m.model_dump(by_alias=True, exclude_none=True) == {
+        'submitUrl': '/foobar',
+        'method': 'POST',
+        'type': 'ModelForm',
+        'formFields': [
+            {
+                'name': 'size',
+                'title': ['Size'],
+                'required': True,
+                'locked': False,
+                'htmlType': 'number',
+                'type': 'FormFieldInput',
+            },
+            {
+                'name': 'cost',
+                'title': ['Cost'],
+                'required': True,
+                'locked': False,
+                'htmlType': 'number',
+                'step': 'any',
+                'type': 'FormFieldInput',
+            },
+            {
+                'name': 'fees',
+                'title': ['Fees'],
+                'required': True,
+                'locked': False,
+                'htmlType': 'number',
+                'step': 0.01,
+                'type': 'FormFieldInput',
+            },
+        ],
+    }