TYPO3 EXT:form prefill a form field with an id of the current object defined in the object table (not uid)

Question

I have a small form in TYPO3 V12 that generates a request for more information on the current object, I'd like to prefill a form field with the id of the object so that it is send with the request, I could not find how to do this.

update: the code of thomas (with a small correction) works but it gives a url parameter (the uid of the object), I need to get a defined object_id from the tx_myext_object_table

Where do you get the object id? Is it in the url parameter? Or can it be set for the complete page via e.g. TypoScript or plugin setting? — Thomas Löffler
– Thomas Löffler, Commented Aug 15 at 7:41
@ThomasLöffler it is a variable in the page, like the id of a news article, and it would be the detail page so it is for the whole page — webman
– webman, Commented Aug 15 at 16:54

Thomas Löffler · Accepted Answer · 2025-08-16 08:42:29Z

1

You can override values in the form via TypoScript.

You need to replace the <> values with your own.
The <indexOfRenderable> you get with the position (beginning with zero) of the field in your form yaml file.

The usage of defaultValue fits for my needs. As I don't have an example with a hidden field, you need to take a look which configuration you need to adjust.
Example (working in v12 with a select field):

plugin.tx_form {
  settings {
    formDefinitionOverrides {
      <formName> {
        renderables {
          <indexOfRenderable> {
            defaultValue = TEXT
            defaultValue.data = GP:<urlParam>
            defaultValue.intval = 1
            defaultValue.if {
              isTrue = 1
              isTrue.data = GP:<urlParam>
            }
          }
        }
      }
    }
  }
}

edited Aug 16 at 8:42

answered Aug 15 at 7:37

Thomas Löffler

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2 Comments

webman Aug 18 at 12:52

thank you, I had to add two nodes but this worked, only that I'd need a value from the database to fill the field, not a url parameter ... not that good with typoscript, but that should be doable too at this point

webman Aug 23 at 18:03

do you have it working like this? I edited your answer to add the 'page renderable' otherwise I guess it does not work, but the edit was not approved ??

webman · Accepted Answer · 2025-08-30 16:43:59Z

With help of my friend Paul Beck I Figured out how to do a proper database search with typoscript, this script produces the result I was looking for:


plugin.tx_form {
    settings {
        formDefinitionOverrides {
            <formName> {
                renderables {
                    <indexOfPage> {
                        renderables {
                            <indexOfRenderable> {
                                defaultValue = CONTENT
                                defaultValue {
                                    table = tx_myext_domain_model_object
                                    select {
                                        pidInList = <objectStoragePid>
                                        uidInList = TEXT
                                        uidInList.data = GP:<urlParam>
                                    }
                                    renderObj = TEXT
                                    renderObj.field = object_id
                                    intval = 1
                                    wrap = #|
                                    if {
                                        isTrue = 1
                                        isTrue.data = GP:<urlParam>
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

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