Default value for input with simple_form

Question

im trying to do default value for input

works ok:

<%= f.input_field :quantity, default: '1' %>

but i need f.input not f.input_field

<%= f.input :quantity %>

im trying it with standard html value - but after unsucessfull validation quantity is overriden by 1 - undesired
```
<%= f.input :quantity, input_html: {value: '1'} %>
```
when i remove value and validation is unsucessfull quantity is populated - everything is ok
```
<%= f.input :quantity %>
```

how to solve this ? is there any alternative like in f.input_field - :default ? or there is any other solution with value ?

marzapower · Accepted Answer · 2014-05-25 21:52:52Z

163

You can try with something like this:

<%= f.input :quantity, input_html: {value: f.object.quantity || '1'} %>

edited May 25, 2014 at 21:52

marzapower

5,6217 gold badges41 silver badges77 bronze badges

answered Sep 26, 2013 at 13:17

Oleg Haidul

3,7421 gold badge24 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Deepak Mahakale · Accepted Answer · 2023-06-01 13:44:59Z

7

You can use the selected option of simple_form:

<%= f.input :quantity, selected: f.object.quantity || '1' %>

edited Jun 1, 2023 at 13:44

Deepak Mahakale

23.8k10 gold badges73 silver badges94 bronze badges

answered Feb 15, 2018 at 20:20

Stefan Lyew

4073 silver badges15 bronze badges

Comments

Kiry Meas · Accepted Answer · 2018-03-02 08:37:49Z

3

try this:

= f.input : quantity, input_html: { value: (f.object.quantity.present?) ? f.object.quantity : '1' }

answered Mar 2, 2018 at 8:37

Kiry Meas

1,25219 silver badges28 bronze badges

1 Comment

rollstuhlfahrer Over a year ago

While this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value.

hellion · Accepted Answer · 2019-02-15 19:09:52Z

1

This is an old question...but, none of provided answers seem acceptable to me. The best way to do this is to set the value in the controllers new action.

 def new
   WizBang.new(quantity: 1)

This will assign the objects quantity key to value 1 in the new action. The edit action should rely on the object's persisted value, or a params value if validation failed and the form reloaded. The other answers will force the quantity to 1 on edit, even if the user initially saved nil (if you allow nil). Not ok. I would not allow nil, but would include a 0 option in the quantity field.

f.input :quantity, collection (0..100)

much cleaner.

answered Feb 15, 2019 at 19:09

hellion

4,9206 gold badges43 silver badges90 bronze badges

Comments

Petercopter · Accepted Answer · 2019-07-18 23:05:12Z

0

You can do

<%= f.input :quantity, value: f.object.quantity || '1' %>

Nowadays, leaving off the input_html key.

answered Jul 18, 2019 at 23:05

Petercopter

1,28711 silver badges18 bronze badges

1 Comment

amphetamachine Over a year ago

That doesn't appear to be correct. Even in the latest version of the simple_form gem (2024-01-02, v5.3.0), the README specifies the value is set by adding input_html: { value: 'mystring' }. Does this work for you? I'm interested to know if you somehow configured simple_form to accept value at the top argument level.

CoderMiguel · Accepted Answer · 2020-03-27 21:16:16Z

0

Now sure how a duplicate Question's answers get referenced, but I am sharing an Answer I just left on a question I flagged as a duplicate.

Here is a summary for this question:

 # simple_form input
 f.input :quantity, input_html: {value: f.object.quantity || '1'}

can become:

 # simple_form input
 = f.input :quantity, input_html: { value: f.object.quantity_with_default }

 # Model with date_start attribute
 class Obj
   def quantity_with_default
     # based on your model, you may need this instead: try(:quantity) || '1' 
     quantity || '1' 
   end
 end

This leaves the management of the data and its defaults in the controller instead of sprinkled throughout the HTML

answered Mar 27, 2020 at 21:16

CoderMiguel

8348 silver badges17 bronze badges

Collectives™ on Stack Overflow

Default value for input with simple_form

6 Answers 6

Comments

Comments

1 Comment

Comments

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

6 Answers 6

Comments

Comments

1 Comment

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related