Add multiple items at once

That would be a nice feature especially when working with large amounts of data.
Not sure how that would work..?

This is outside of this project (field collection), but I figured out this bit of code may help.
You can use that to add your own #submit function in the "Add another item" button && add/remove as many widgets as you want.

/**
 * Implements hook_field_attach_form()
 * We are looking at our t2imageclient widget after the "Add another item" has been added.
 * We are going to alter the behavior of this button, to let us add as many new entries as
 * we want.
 */
function YOURMODULE_field_attach_form($entity_type, $entity, &$form, &$form_state, $langcode)
{
  $options = array('language' => field_valid_language($langcode));

  // Merge default options.
  $default_options = array(
    'default' => FALSE,
    'deleted' => FALSE,
    'language' => NULL,
  );
  $options += $default_options;

  list(, , $bundle) = entity_extract_ids($entity_type, $entity);
  $instances = _field_invoke_get_instances($entity_type, $bundle, $options);

  // Iterate through the instances.
  $return = array();
  foreach ($instances as $instance) {
    // field_info_field() is not available for deleted fields, so use
    // field_info_field_by_id().
    $field = field_info_field_by_id($instance['field_id']);
    $field_name = $field['field_name'];

    //If we are looking at our field type and specific widget type, and we are multiple entries
    if($field['type'] == 'TODO_PUT_YOUR_FIELD_TYPE' && 
      $instance['widget']['type'] == 'TODO_PUT_YOUR_WIDGET_TYPE' && 
      $field['cardinality'] == FIELD_CARDINALITY_UNLIMITED)
    {
      //Check just in case the button is here, and add another #submit function
      if(isset($form[$field['field_name']]['und']['add_more']))
      {
        $form[$field['field_name']]['und']['add_more']['#submit'][] =
          'YOURMODULE_field_add_more_submit';
      }
    }
  }
}

/**
 * Our extra "Add another item" #submit handler. Copy pasted the field_add_more_submit
 * function, altered to change the nb of widgets based on our conditions.
 */
function YOURMODULE_field_add_more_submit($form, &$form_state)
{
  //Put here the condition for altering the nb of widgets, e.g. it could be based on a 
  //POST value
  if(true /** TODO */)
  {
    $button = $form_state['triggering_element'];

    // Go one level up in the form, to the widgets container.
    $element = drupal_array_get_nested_value($form, array_slice($button['#array_parents'], 0, -1));
    $field_name = $element['#field_name'];
    $langcode = $element['#language'];
    $parents = $element['#field_parents'];

    // Alter the number of widgets to show. items_count = 0 means 1.
    $field_state = field_form_get_state($parents, $field_name, $langcode, $form_state);
    //Here as an example, I am adding 10
    $field_state['items_count'] += 10;
    //But you can just fix the nb of items, like 5
    $field_state['items_count'] = 5;
    field_form_set_state($parents, $field_name, $langcode, $form_state, $field_state);

    $form_state['rebuild'] = TRUE;
  }
}

Enjoy!

Hi all

any other ideas? because the variable $form[$field['field_name']]['und']['add_more'] is not set on my form

regards and thx

solution: use the form_alter to add the submit function

building on the excellent reply #2 by ndeschildre.
Just adding a simple select list of numbers to allow adding x number of items

/**
* Implements hook_field_attach_form()
*/

function village_field_attach_form($entity_type, $entity, &$form, &$form_state, $langcode){
  $options = array('language' => field_valid_language($langcode));
  // Merge default options.
  $default_options = array(
    'default' => FALSE,
    'deleted' => FALSE,
    'language' => NULL,
  );
  $options += $default_options;
  list(, , $bundle) = entity_extract_ids($entity_type, $entity);
  $instances = _field_invoke_get_instances($entity_type, $bundle, $options);
  // Iterate through the instances.
  $return = array();
  foreach ($instances as $instance) {
    // field_info_field() is not available for deleted fields, so use
    // field_info_field_by_id().
    $field = field_info_field_by_id($instance['field_id']);
    $field_name = $field['field_name'];
    //If we are looking at our field type and specific widget type, and we are multiple entries
    if($field['cardinality'] == FIELD_CARDINALITY_UNLIMITED){
      //Check just in case the button is here, and add another #submit function
      if(isset($form[$field['field_name']]['und']['add_more'])){
        // add a simple select list, this defaults to numb 3
        $form[$field['field_name']]['add_more_number'] = array(
          '#type' => 'select',
          '#title' => t('Add more no.'),
          '#options' => drupal_map_assoc(range(0, 50)),
          '#default_value' => 2,
        );
        $form[$field['field_name']]['und']['add_more']['#submit'][] = 'village_field_add_more_submit';
        $form[$field['field_name']]['und']['add_more']['#value'] = 'Add more rows';
      }
    }
  }
}

function village_field_add_more_submit($form, &$form_state){
  $button = $form_state['triggering_element'];
  // Go one level up in the form, to the widgets container.
  $element = drupal_array_get_nested_value($form, array_slice($button['#array_parents'], 0, -1));
  $field_name = $element['#field_name'];
  $langcode = $element['#language'];
  $parents = $element['#field_parents'];
  // Alter the number of widgets to show. items_count = 0 means 1.
  $field_state = field_form_get_state($parents, $field_name, $langcode, $form_state);
  //get the number from the select
  $numbtoadd = $form[$field_name]['add_more_number']['#value'];
  if($numbtoadd){
    $field_state['items_count'] += $numbtoadd;
    field_form_set_state($parents, $field_name, $langcode, $form_state, $field_state);
    $form_state['rebuild'] = TRUE;
  }
}

note, village_ is the custom module name in this case.
I think this is great oppertunity for a little module! something like field_add_x.module ? :)

Hi digitisation,

I am trying to use your code, and i will like to do a module with that. But right now is not working right. The Add More button is working just one time, after that you can´t use it anymore. Also will be nice if the select could be together with the submit button. I try to do it like that... but it is not working good. (http://screencast.com/t/kL0PtO5boSlz)

Thanks!
El Alemaño

Worked perfectly for me (core 7.31), thank you so much! I actually called the module field_add_x ;)

haha - good name.
I came across and issue with recursive field collection though (not a surprise) but I'm sure you can figure it out.

This is controlled by Drupal's handling of unlimited cardinality field items. A solution could be useful for any field but it is by no means a field collection specific issue.

Hi,

I was using the "patch" but right now I can not delete any field_collection, because the save button of the form is gone when I delete on item of the field collection.
Any idea how I can fix that?

Thanks!

I have no idea what Core 7 is, so moving back to Field Collection.

Well thanks for your rude comment. The metadata was changed with absolutely no explanation, so I apologize for not being able to read people's minds.

Did you know that "Core 7" is a sandbox?
https://www.drupal.org/node/1244394

I'm assuming that's not what you meant?

Changing to the Drupal core issue queue since now I know what the intention was...

#2 and #5... Amazing! Thanks for your help. This is exactly what I needed.

I tweaked one line for my own use so that the change is only applicable to field collections
if($field['cardinality'] == FIELD_CARDINALITY_UNLIMITED && $field['type'] == "field_collection"){

@davidwbarratt Thanks for updating the incorrect values. If you're confused about the status of an issue then try reading it's comment history as the information will often be there.

#2 and #5 worked for me like a charm ! That's what I was looking for.

Hello
I confirm it works with #2 o #5 with edit form but i want add it to field-collection/field-myfield/add/node/xxxx
appear button "add another item" add add multi line to form
how can i do it?

Thank you so much !
I was getting crazy waiting for each new item, now I still have to wait but I can create 50 items at a time :D

So if any beginner (like me) wants this excellent piece of code to work, but wonders where to insert it :
you have to create a new module .
And it's a 5mn job if you have an FTP access.

- create folder site/all/modules/helloworld on your drupal install
- create in your folder the file helloworld.module containing the php code in comment #5
replace in the code "village_" by "helloworld_"
- create another file helloworld.info containing :

name = Hello World
description = Description of what this module does
core = 7.x

- the module is created : activate it from the modules section
- edit a content that uses a field collection to check if it works

(just trying to summarize... official Drupal 7 documentation about creating modules is available with more details)

#2 and #5 worked for me TOO. I use Drupal 7.56...
I also use only with field collection as @shomari.

Thanks to @ndeschildre and @8bitplateau.

#5 is working for me on individual fields. Does anyone know how to get this to work with the Paragraphs module? I need to add multiple Paragraph fields to a node. I am using Drupal 7. Thanks!

I also faced the same issue. I found a helpful article: https://www.gyanblog.com/gyan/drupal-how-add-multiple-fields-single-button/
I also used Paragraphs module. No coding required. This is just awesome.

Just ran into the same issue and found this one. When having a longer list of items to add, this is really painful and shouldn't be too hard to solve?

While "Add another item" currently has multiplicity of "1", we could instead prefix this button with a number (int) input field, prefilled with "1" in the style of a dropbutton toggle, but instead of havin the arrow part on the right, with a number on the left.

That way it would still be 1 click if only one line is needed, with great UX is more items are needed and it perfectly fits the Drupal UI:

I'm sorry this looks ugly in my screenshot, I'm not a designer ... -.- It should be turned around dropbutton style:

Perhaps someone can sketch that more beautiful? Do you like the idea?