Search vertical set result source/destination for search box

Question

We have created two different result sources This site and Site discussions. They each point to a custom search results page on our site. That is all working well.

When a search goes to the Site discussions result page, I would like to select the Site discussions result source instead of reverting to the This site default.

I can't find anything to help with this. So many searches just return how to set the value in the web ui.

I'm looking for some javascript that can set the result source in the searchbox on page load.

Answer 1

The result source is a property of the Search Result web part.

1. Edit the page
2. Edit the Search Results Web part
3. Edit the query and change the result source to the desired source.
4. Save the web part, save the page, check in, and publish.

Answer 2

I've been poking around in _layouts\15\search.clientcontrols.js This is the best answer I've been able to come up with. I've put this code in a script editor on the discussions results page.

Sys.Application.add_load(setSearch);

function setSearch(){
    var searchBox = $getClientControl($get('SearchBox'));

    searchBox.set_resultsPageAddress(document.location.pathname);
    searchBox.set_currentPrompt('Search discussions')
}

I do have to know what the prompt should be -- I haven't figured out how to dynamically get the possible search results from the searchbox, but in this case it will work fine.