update request body value in onBeforeCall hook not working

[lling1105]

i need to modify request body value before it assign to individual service. i had modify body value in the onBeforeCall hook, but not working.

onBeforeCall(ctx, route, req, res){

                        ctx.params.req.body.sql = '...'
                    }
                }

[lling1105]

ignore this question. i should use middleware.