Pass multiple variables to render json in rails cotroller

Hemant Bhargava

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Apr 10, 2015, 2:01:55 PM4/10/15

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I am trying to pass the data from controller to javascript. This is how
you do it,

respond_to do |format|
format.html
format.json { render json: {data: @data} }
end
And then in your view file, you should do this:

<%= javascript_tag do%>
window.data = <%= raw @data.to_json %>
<%end%>

<script>
for( i = 0; i < data.length; i++ ) {
alert(data[i]);
}
</script>
Make sense. Right?

However, above code is when you are passing only one variable in json
code i.e. data variable. What I need to do is to pass multiple variables
to my javascript code.

It should be done as:

respond_to do |format|
format.html
format.json { render json: {all_data: {data: @data, data1: @data1,
data2: @data2}}}
end

Now, - How should I access the data1 & data2 variables in my view file?

My view file has:

<%= javascript_tag do%>
window.data = <%= raw @all_data.to_json %>
<%end%>

<script>
for( i = 0; i < all_data.length; i++ ) {
alert(all_data[i]);
}
</script>

Above alerts me NULL. What have I done wrong? Where have I messed up?

Any leads would be appreciated.

Cheers!

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Dmitry Shvetsov

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Apr 11, 2015, 10:26:13 PM4/11/15

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Hi, your view is html?

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Dmitry Shvetsov

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Apr 11, 2015, 10:44:22 PM4/11/15

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Controllers with respond_to format block responds with one format for each request. I belief you requested html format so this should works for you:

respond_to do |format|

format.html { @all_data = {data: @data, data1: @data1, data2: @data2} }

# if you still need respond to json you should uncomment/not delete next line

# format.json { render json: {all_data: {data: @data, data1: @data1, data2: @data2}}}

end

</pre>

Dmitry Shvetsov

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Apr 11, 2015, 10:45:08 PM4/11/15

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sorry, this should be more readable

respond_to do |format|

format.html { @all_data = {data: @data, data1: @data1, data2: @data2} }

# if you still need respond to json you should uncomment/not delete next line

# format.json { render json: {all_data: {data: @data, data1: @data1, data2: @data2}}}

end

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