Getting Missing Submit Button even though I have used st.form_submit_button

Using Streamlit
1

I am using streamlit forms. This is my sample code:-

    with st.form(key="income_form"):
        amount = st.number_input("Amount")
        date = st.date_input("Date")
        time = st.time_input("Time")
        note = st.text_input("Note")
        submitted = st.form_submit_button(label="Submit")

When I run it as simple app, it works correctly.
But whenever I try to run this in multi app, I get the following error:-

image
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And also the form is loading every time I change something. This should not happen.

I am not able to debug the issue.

1 Like
2

streamlit.bootstrap breaks forms. I was using boostrap to debug in PyCharm. When run via terminal this works fine.

1 Like
3

Do we know if there will be a fix for this reported error with “missing submit button”, it’s a little frustrating?

1 Like
4

I am also interested in a fix for the form submit button, because I also use streamlit.bootstrap.

1 Like
5

Hi, thanks for bringing this to light. I suggest creating a feature enhancement in our github issues page (Issues · streamlit/streamlit · GitHub). Based on the likes and community involvement, we highly consider issues with high likes and community involvement!

6

For those who get the same error but do not have bootstrap components implemented:

I’ve implemented an on_click function in the st.form_submit_button and wasn’t using an if statement for the submit_button that takes action upon clicking the button. Changing my code similar to this removed the error:

submit_button = st.form_submit_button()
if submit_button: do_something
7

here looking for a solution. When I click form submit button it disappears and I get the same error “missing submit…”

I tried to use the example form submit. It works ok in its own page but as soon as a form is added to the page where I need it there is an error. I do not have an if statement as above.

debugging further it seems there is an error caused by use of
st.session_state.update(st.session_state)

I have been able to remove the behaviour via
st.session_state.update()

It doesnt look like there is any issue with my multipage app with this but now I am wondering why I had the recursive st.session_state.update(st.session_state)

8

I’m having this problem as well, On submit of the form I set a few session variables, one indicating what step of a process I’m on, and then do both a st.session_state.update and an st.rerun and I still get the form rerendering with the missing buttons error but it only appears briefly.

10

Same issue with multi-page app and missing submit button. When the app re-runs it throws this error.