Form
Forms are used to collect user input. The rx.form component is used to group inputs and submit them together.
The form component's children can be form controls such as rx.input, rx.checkbox, rx.slider, rx.textarea, rx.radio_group, rx.select or rx.switch. The controls should have a name attribute that is used to identify the control in the form data. The on_submit event trigger submits the form data as a dictionary to the handle_submit event handler.
The form is submitted when the user clicks the submit button or presses enter on the form controls.
Results
{}
class FormState(rx.State):
form_data: dict = {}
def handle_submit(self, form_data: dict):
"""Handle the form submit."""
self.form_data = form_data
def form_example():
return rx.vstack(
rx.form(
rx.vstack(
rx.input(
placeholder="First Name",
name="first_name",
),
rx.input(
placeholder="Last Name",
name="last_name",
),
rx.hstack(
rx.checkbox("Checked", name="check"),
rx.switch("Switched", name="switch"),
),
rx.button("Submit", type="submit"),
),
on_submit=FormState.handle_submit,
reset_on_submit=True,
),
rx.divider(),
rx.heading("Results"),
rx.text(FormState.form_data.to_string()),
) When using the form you must include a button or input with type='submit'.
Dynamic Forms
Forms can be dynamically created by iterating through state vars using rx.foreach.
This example allows the user to add new fields to the form prior to submit, and all
fields will be included in the form data passed to the handle_submit function.
Results
{}
class DynamicFormState(rx.State):
form_data: dict = {}
form_fields: list[str] = [
"first_name",
"last_name",
"email",
]
@rx.var(cache=True)
def form_field_placeholders(self) -> list[str]:
return [
" ".join(
w.capitalize() for w in field.split("_")
)
for field in self.form_fields
]
def add_field(self, form_data: dict):
new_field = form_data.get("new_field")
if not new_field:
return
field_name = (
new_field.strip().lower().replace(" ", "_")
)
self.form_fields.append(field_name)
def handle_submit(self, form_data: dict):
self.form_data = form_data
def dynamic_form():
return rx.vstack(
rx.form(
rx.vstack(
rx.foreach(
DynamicFormState.form_fields,
lambda field, idx: rx.input(
placeholder=DynamicFormState.form_field_placeholders[
idx
],
name=field,
),
),
rx.button("Submit", type="submit"),
),
on_submit=DynamicFormState.handle_submit,
reset_on_submit=True,
),
rx.form(
rx.hstack(
rx.input(
placeholder="New Field",
name="new_field",
),
rx.button("+", type="submit"),
),
on_submit=DynamicFormState.add_field,
reset_on_submit=True,
),
rx.divider(),
rx.heading("Results"),
rx.text(DynamicFormState.form_data.to_string()),
)