Improving ruby code - ruby-on-rails

people said to me that I have an wrong code at this point. The main idea of this method is to create 1 event if user pressed once, and a row of events if user pressed daily or weekly. Everything works well, but code is so bulky.
def create
#event = Event.new(event_params
#event.start_time = DateTime.parse(params[:start_time], "%Y-%m-%d %H:%i")
#event.end_time = DateTime.parse(params[:end_time], "%Y-%m-%d %H:%i")
#event.user_id = current_user.id
#event.update_attributes(:repeat_id => #event.id) if #event.save
respond_to do |format|
if #event.save
format.html { redirect_to persons_profile_path }
else
format.html { render :new }
format.json { render json: #event.errors, status: :unprocessable_entity }
end
interval = 60 if #event.repeat =='daily'
interval = 20 if #event.repeat =='weekly'
#creating row of events
if #event.repeat != 'once'
(1..interval).each do |i|
#event = Event.new(event_params)
#event.start_time = DateTime.parse(params[:start_time], "%Y-%m-%d %H:%i")
#event.end_time = DateTime.parse(params[:end_time], "%Y-%m-%d %H:%i")
#event.user_id = current_user.id
if #event.repeat =='daily'
#event.start_time = DateTime.parse(#event.start_time.to_s) + i.day
#event.end_time = DateTime.parse(#event.end_time.to_s) + i.day
end
if #event.repeat =='weekly'
#event.start_time = DateTime.parse(#event.start_time.to_s) + i.week
#event.end_time = DateTime.parse(#event.end_time.to_s) + i.week
end
#event.update_attributes(:repeat_id => k) if #event.save
#event.save
end
end
I can't find another solutions. Any ideas? Dont pay attention on parse methods on date, its needed to JS.

I think the issue is that you are using the controllers to do too much work and it's hard to read. Typically controllers look like:
def create
#client = Client.new(params[:client])
if #client.save
redirect_to #client
else
render "new"
end
end
Take a moment and think about your data. You create events. You want your events to appear in a row if the create button is pressed daily or weekly. So we are thinking about how to display it, that's a css/html issue, not something relating to controllers.
The reason people are saying your code as wrong is because you are doing something very atypical. If you submitted this code for school or a project you would get a low score because you are making everyone else work hard to understand your work, instead of following the same basic style that everyone was trained in.

Related

.where returning nil?

def new
#host = Host.find(params[:id])
#lastreview = Review.where("user_id = ? AND host_id = ?", current_user[:id], #host.id)
if #lastreview == nil
#review = Review.new
else
redirect_to #host, notice: "You already posted a review for this host!"
end
end
For some reason it is not returning nil even though their are no reviews? Am I misunderstanding the usage?
where returns an array - if there are no reviews in your table that match your conditions, the array that it returns will be empty, but it will never be nil.
Try this instead:
if #lastreview.empty?
#review = Review.new
else
redirect_to #host, notice: "You already posted a review for this host!"
end
If you don't actually need the last records, you can use exists?:
Returns true if a record exists in the table that matches the id or conditions given, or false otherwise.
This should work (Rails can handle the _id suffixes if everything is set up correctly):
def new
#host = Host.find(params[:id])
if Review.exists?(user: current_user, host: #host)
#review = Review.new
else
redirect_to #host, notice: "You already posted a review for this host!"
end
end

API received information from calls is appended with extra characters

I have a controller for my API for Rails app.However, messages received are appended with 6 underscores. #message.message = CGI.unescape(params[:message]).strip has the #message.message string appended with an extra 6 underscores.
For example;
#message.message for xample ends up with the value "Hi, Joseph and Beatrice invite you for our wedding day preparation meetings Fridays, starting 5/10/2012 at Calvary Chapel Kampala - William Street Gadith ______"
The controller is as shown below;
def sms
#message = Message.new
decoded_to = CGI.unescape(params[:to])
##message.to = decoded_to.gsub(/[^\d]/,"")
#message.to = CGI.unescape(params[:to]).strip.gsub("+","").gsub(/\s+/, "")
#message.from = CGI.unescape(params[:from])
#message.message = CGI.unescape(params[:message]).strip
#message.user_id = current_user.id
#message.status = 'Queued'
if #message.save
MessageWorker.perform_async(#message.id, [""], current_user.id)
render json: {status: "Success"}
else
render json: {status: "Failed" }
end
end
What could be the problem?
All help is appreciated.

Rails Controller is ignoring queries

I'm creating a simple upvote/downvote system similar to reddit's, where users can upvote/downvote something and change their minds if need be.
I have a page that makes an AJAX call to the 'create' action of my controller. The controller has no problem creating the record and returning the proper js.erb. However, I'd like to see if an existing post exists, and if so, I'd like to destroy it. My controller looks like this:
def create
#vote = GameVote.new
#vote.game_id = params[:game_id]
#vote.vote = params[:vote]
#vote.user_id = session[:user_id]
existing_vote = GameVote.where(whatever)
respond_to do |format|
if #vote.save
format.js
end
end
end
It just seems to ignore the middle query, preventing me from destroying it if it exists before attempting to save the new entry. Any ideas?
It seems more natural to update the existing GameVote (if one exists) instead of pair delete+create.
To do so just replace:
#vote = GameVote.new
#vote.game_id = params[:game_id]
#vote.vote = params[:vote]
#vote.user_id = session[:user_id]
existing_vote = GameVote.where(whatever)
with:
#vote = GameVote.where(game_id: params[:game_id], user_id: session[:user_id]).first_or_initialize
#vote.vote = params[:vote]
Try :
#vote = GameVote.find_or_create_by_game_id_and_user_id(params[:game_id], session[:user_id])
OR
#vote = GameVote.find_or_create(:game_id => params[:game_id], :user_id => session[:user_id])
#vote.vote = params[:vote]

Help me refactor this nasty Ruby if/else statement

so I have this big method in my application for newsletter distribution. Method is for updating rayons and I need to assign a user to rayon. I have relation n:n through table colporteur_in_rayons which has attributes since_date and until_date.
I am a junior programmer and I know this code is pretty dummy :)
I appreciate every suggestion.
def update
rayon = Rayon.find(params[:id])
if rayon.update_attributes(params[:rayon])
if params[:user_id] != ""
unless rayon.users.empty?
unless rayon.users.last.id.eql?(params[:user_id])
rayon.colporteur_in_rayons.last.update_attributes(:until_date => Time.now)
Rayon.assign_user(rayon.id,params[:user_id])
flash[:success] = "Rayon #{rayon.name} has been succesuly assigned to #{rayon.actual_user.name}."
return redirect_to rayons_path
end
else
Rayon.assign_user(rayon.id,params[:user_id])
flash[:success] = "Rayon #{rayon.name} has been successfully assigned to #{rayon.actual_user.name}."
return redirect_to rayons_path
end
end
flash[:success] = "Rayon has been successfully updated."
return redirect_to rayons_path
else
flash[:error] = "Rayon has not been updated."
return redirect_to :back
end
end
def update
rayon = Rayon.find(params[:id])
unless rayon.update_attributes(params[:rayon])
flash[:error] = "Rayon not updated."
return redirect_to :back
end
puid = params[:user_id]
empty = rayon.users.empty?
if puid == "" or (not empty and rayon.users.last.id.eql?(puid))
msg = "Rayon updated.",
else
msg = "Rayon #{rayon.name} assigned to #{rayon.actual_user.name}.",
rayon.colporteur_in_rayons.last.update_attributes(
:until_date => Time.now) unless empty
Rayon.assign_user(rayon.id, puid)
end
flash[:success] = msg[msg_i]
return redirect_to rayons_path
end
there was a some double code. So remove that. But also, there is some business code in the controller, which should not be there. So i should refactor the controller code as follows:
def update
rayon = Rayon.find(params[:id])
if rayon.update_attributes(params[:rayon])
if params[:user_id] != ""
rayon.handle_update_user(params[:user_id]
flash[:success] = "Rayon #{rayon.name} has been succesuly assigned to #{rayon.actual_user.name}."
else
flash[:success] = "Rayon has been successfully updated."
end
return redirect_to rayons_path
else
flash[:error] = "Rayon has not been updated."
return redirect_to :back
end
end
The controller method now clearly deals with the actions that need to be taken, and sets a flash method accordingly if needed.
In the Rayon model you write the code what needs to be done when an update is done by a user:
class Rayon
def handle_update_user(user_id)
if (!users.empty? && users.last.id.eql?(params[:user_id]))
# do nothing!
else
colporteur_in_rayons.last.update_attributes(:until_date => Time.now) unless users.empty?
Rayon.assign_user(rayon.id,params[:user_id])
end
end
end
This clearly seperates the concerns. A rayon should know what happens when a user updates it (the name of the function could be improved to what you actually want it to mean, as that is not entirely clear to me).
It could be shorter, but i like to write explicitely that nothing needs to be done if the last user is the same as the current. Otherwise, actions need to be taken. If i understood correctly.
Here's my take at it. I put a bunch of comments inline describing why I changed what I did.
def update
rayon = Rayon.find(params[:id])
if rayon.update_attributes(params[:rayon])
user_id = params[:user_id] # using same value a couple times
# if-else strongly preferred over unless-else...
# so replace `unless foo.empty?` with `if foo.length > 0`
if user_id.length > 0 # then string != ""
# `if A && B` more readable than `unless X || Y` in my opinion
if rayon.users.length > 0 && rayon.users.last.id != user_id
rayon.colporteur_in_rayons.last.update_attributes(:until_date => Time.now)
end
# same line in if-else; pull outside
Rayon.assign_user(rayon.id, user_id)
flash[:success] = "Rayon #{rayon.name} has been successfully assigned to #{rayon.actual_user.name}."
else
flash[:success] = "Rayon has been successfully updated."
end
# all branches in here return this value, pull outside
return redirect_to rayons_path
else
flash[:error] = "Rayon has not been updated."
return redirect_to :back
end
end
The largest issue I noticed with your code is that you had a lot of duplication in your first if-block. All the branches in the true section reached return redirect_to rayons_path, so that got pulled to the end of the block. You had the same flash[:success] = ... twice, so that got pulled out as well.
if-else is much more readable than unless-else, so try to avoid using the latter. I'm not a fan of one unless immediately nested inside another, so I changed that to a compound if-statement.
One of the primary idioms in Rails is DRY (Don't Repeat Yourself), so try to identify spots where you do have repetitive code.
(Also note that I haven't tested this refactoring -- I'm pretty sure that the logic is still the same, but I can't prove it.)
def update
rayon = Rayon.find(params[:id])
unless rayon.update_attributes(params[:rayon])
flash[:error] = "Rayon has not been updated."
return redirect_to :back
end
if params[:user_id].empty?
msg = "Rayon has been successfully updated."
else
if rayon.users.empty?
Rayon.assign_user(rayon.id,params[:user_id])
msg = "Rayon #{rayon.name} has been successfully assigned to #{rayon.actual_user.name}."
elsif not rayon.users.last.id.eql?(params[:user_id])
rayon.colporteur_in_rayons.last.update_attributes(:until_date => Time.now)
Rayon.assign_user(rayon.id,params[:user_id])
msg = "Rayon #{rayon.name} has been succesuly assigned to #{rayon.actual_user.name}."
end
end
flash[:success] = msg
return redirect_to rayons_path
end

rails redirect after create problem

Could anyone help with this problem:
Upon "create", the user is redirected to the url: model/model_id (eg post/1), instead I am redirected to models/url_encoding_object (eg posts/.%23) and there is an "406 Not Acceptable" message in the console.
Typically, upon create, the console's message is "Processing PostsController#create (for 000.0.0.0 at 2009-11-23 12:32:52) [POST]", but with this error, the message is "Processing PostsController#create to # (for 000.0.0.0 at 2009-11-23 12:32:52) [POST]"
I've seen austinfromboston's response and tried his "old fashioned but effective" solution to that similar problem, but it doesn't work for me.
Any help would be greatly appreciated
Controller Code:
# POST /groups
# POST /groups.xml
def create
#group = Group.new(params[:group])
#group.category = params[:category]
#group.user = current_user
#here we add the current user to the membership collection of the group
#membership = #group.memberships.build(params[:membership])
#membership.group = #group
#membership.user = current_user
#membership.initiator = false
#membership.membership_status_id = 2
#and here we set the current_user as the owner of the group
#group_permission = #group.group_permissions.build(params[:group_permission])
#group_permission.membership = #membership
#group_permission.group_role = GroupRole.find_by_name('Owner')
unless params[:metro_area_id].blank?
#group.metro_area = MetroArea.find(params[:metro_area_id])
#group.state = (#group.metro_area && #group.metro_area.state) ?
#group.metro_area.state : nil
#group.country = #group.metro_area.country if (#group.metro_area &&
#group.metro_area.country)
else
#group.metro_area = #group.state = #group.country = nil
end
#group.tag_list = params[:tag_list] || ''
# unless #user.is_in_group?(#group)
# #user.memberships << #group
# end
respond_to do |format|
if #group.save
flash[:notice] = :group_was_successfully_created.l
format.html { redirect_to(group_path(#group.id)) }
else
format.html {
#metro_areas, #states = setup_metro_area_choices_for(#group)
if params[:metro_area_id]
#metro_area_id = params[:metro_area_id].to_i
#state_id = params[:state_id].to_i
#country_id = params[:country_id].to_i
end
render :action => "new"
}
end
end
end
Looks like either your routes are off somewhere or your model_id parameter is not what you are expecting. Might want to check to see what that parameter is being set to.
It's also really hard to give any suggestions without seeing controller code. Can you post the method making this call?
There's a lot of superfluous code, in your controller. It still works, but you're doing a lot of things the hard way.
Your problem is this line:
format.html { redirect_to(groups_path(#group.id)) }
Which redirects to the collective groups url adding the parameter #group.id.
What it should be is
format.html { redirect_to(group_path(#group.id)) }
# POST /groups
# POST /groups.xml
def create
#group = Group.new(params[:group])
#group.category = params[:category]
#group.user = current_user
#here we add the current user to the membership collection of the group
#membership = #group.memberships.build(params[:membership])
#membership.group = #group
#membership.user = current_user
#membership.initiator = false
#membership.membership_status_id = 2
#and here we set the current_user as the owner of the group
#group_permission = #group.group_permissions.build(params[:group_permission])
#group_permission.membership = #membership
#group_permission.group_role = GroupRole.find_by_name('Owner')
unless params[:metro_area_id].blank?
#group.metro_area = MetroArea.find(params[:metro_area_id])
#group.state = (#group.metro_area && #group.metro_area.state) ? #group.metro_area.state : nil
#group.country = #group.metro_area.country if (#group.metro_area && #group.metro_area.country)
else
#group.metro_area = #group.state = #group.country = nil
end
#group.tag_list = params[:tag_list] || ''
unless #user.is_in_group?(#group)
#user.memberships << #group
end
respond_to do |format|
if #group.save
flash[:notice] = :group_was_successfully_created.l
format.html { redirect_to(groups_path(#group.id)) }
else
format.html {
#metro_areas, #states = setup_metro_area_choices_for(#group)
if params[:metro_area_id]
#metro_area_id = params[:metro_area_id].to_i
#state_id = params[:state_id].to_i
#country_id = params[:country_id].to_i
end
render :action => "new"
}
end
end
end
What is this .1 doing at the end of the line??
flash[:notice] = :group_was_successfully_created.l
I tried to run similar code in my environment and it choked on that.
It should also reference:
group_path(id)
not
groups_path(id)

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