ruby on rails - Pass symbol as Arguments -

i have defined , working method as,

render_format(doc,host,table_info) 

i had method called @ location wherein passed arguments as,

render_format("daily transactions in pos", {:doc => xml,:schema_name => "#{schema_name}",:store_code => "#{store_code}"}, :sales_log => "#{sales_log}") 

this worked fine.

now have call method as,

render_format(:doc => xml,:host => "bhindi.rw:3000",:table_info => {'hdr' => 'pos_invoices', 'line' => 'pos_invoice_lines', 'id' => 'pos_invoice_id', 'check_image_flag' => 'y'}) 

but gives argumenterror, wrong number of arguments(1 3) treating whole of 1 single argument. why that?

when use hash last (or only) method argument in list ruby allows omit curly braces. in first call, arguments of different types (strings , hashes), ruby understands these several parameters. in second call, each of parameters hash 1 key-value pair, because of optional outside curly braces ruby interprets 1 hash, giving argumenterror.

you can wrap each hash in own curly braces letting ruby know in fact individual separate hashes:

render_format({ :doc => xml }, { :host => "bhindi.rw:3000" }, { :table_info => {'hdr' => 'pos_invoices', 'line' => 'pos_invoice_lines', 'id' => 'pos_invoice_id', 'check_image_flag' => 'y'} })

you can see in action in first method call - second argument hash wrapped in own curly braces, while last 1 not. if omitted outer curly braces on second argument, ruby interpret second , third arguments 1 hash , give argumenterror, wrong number of arguments(2 3) error.

alternatively, if can change implementation of method in question, can accept 1 hash argument , separate values key inside method.