I'm using this method to pass back outfits from an ajax call:
def givemeoutfits
if current_user
#outfits = Outfit.search(params[:search],1000000,1,1000000,1,1000000,1,1000000,1).page(1).per(7).results
#results = Outfit.search(params[:search],1000000,1,1000000,1,1000000,1,1000000,1).page(1).per(7).results.total_count
if request.xhr?
render status: 200, json: #outfits
end
end
end
I want to add the integer 'results' to the json produced by the #outfits and returned to the ajax call. How can I do this?
Are you just wanting to include #results in the returned JSON object, like this?
render status: 200, json: {
outfits: #outfits,
results: #results
}
Then, in your javascript, you can interact with both keys.
Related
I have the following code that responds to GET /something.json:
def index
#something = Something.all
respond_to do |format|
format.json { render json: #something }
end
end
That runs a SELECT * FROM something in the database, formats the result into a JSON, and responds with it.
The request might ask for another field through a query parameter, which is in a different table than something. I managed to retrieve the desired field doing this:
def index
#something = Something.all
if params[:get_field_from_some_other_table] == "true"
#something.each do |i|
some_other_table = SomeOtherTable.find(i.some_other_table_id)
the_field_i_want = some_other_table.the_field
end
end
respond_to do |format|
format.json { render json: #something }
end
end
But I haven't found a way to add the field to the JSON string. How can I do that? Or is there a better way to retrieve the field with the contents of the something table through a JOIN or something like that?
something and other_table should be related at active_record somehow... maybe a has_one?
Try that and then just use #something.all.includes(:other_table_attribute)
Apart from that, please post your code properly with some readable examples, that helps a lot and will give you faster responses :)
I have a resource that renders as JSON perfectly fine at localhost:3000/gins.json from #gins = Gin.order(name: :desc).
Which will return ALL gins. However, I'd like to have a JSON response that only returns the last 4 gins, to use elsewhere. In the controller I also have:
#latestgins = Gin.order("created_at DESC").first(4)
The above would work in an index.html.erb view with <%= #latestgins.name %>, but how do I get the JSON for this? I have tried render json: #latestgins but navigating to localhost:3000/latestings.json, of course, gives a routing error.
I suspect I'm attacking this in completely the wrong way, but only just starting out with Rails API.
you can add respond to format json in your index method:
def index
#gins = Gin.order(name: :desc)
#latestgins = Gin.order("created_at DESC").first(4)
respond_to do |format|
format.html
format.json { render json: #latestgins }
end
end
your #latestgins is now available here : localhost:3000/gins.json
Edit
If you want a custom route to display your data, just add it in your routes:
defaults format: :json do
get 'last4gins', to: "gins#index"
end
Your data for the last 4 entries is available at http://localhost:3000/last4gins.json, at http://localhost:3000/last4gins but also at localhost:3000/gins.json
If you want to keep the gins index route clean, you can also create a custom method and remove the #latestgins from your index:
# routes
get 'last4gins', to: "gins#last4gins"
#controller
def index
#gins = Gin.order(name: :desc)
end
def last4gins
#latestgins = Gin.order("created_at DESC").first(4)
render json: #latestgins
end
Now the data is no more available at /gins.json
I am trying to create multiple database entries using only one JSON request.
Each entry consists only of two values, a type (of action) and a time (when the action happened). To get multiple of those into one request, I am using a JSON Array.
This is what my create action in the controller looks like:
def create
respond_to do |format|
#actions = []
save_succeeded = true
params[:action].each do |action|
new_action = Action.new(type: action.type, time: action.time)
save_succeeded = false unless new_action.save
#actions << new_action
end
if save_succeeded
format.json { render json: #actions, status: :created }
else
format.json { render json: #actions.errors, status: 501 }
end
end
end
When I send a post request to the controller (/actions.json) like this:
[{ "type": 0, "time": 1234567890 },{ "type": 0, "time": 1234567891 }]
I get back an empty array [] and a status code of 201 Created.
This means, the save_succeeded variable is still true, but the actions did not get added to the array. Furthermore, the actions are not in my database.
What am I doing wrong? What am I overlooking?
I would refactor the code a bit:
def create
actions = params[:action].inject([]) do |memo, action|
memo << Action.create!(type: action[:type], time: action[:time])
end
render json: #actions, status: :created
rescue ActiveRecord::RecordInvalid => e
render json: e.message, status: 501
end
end
Couple of notable changes:
use create! and rescue ActiveRecord::RecordInvalid - create! will raise a ActiveRecord::RecordInvalid if the save fails. Then, the rescue block will rescue the exception and you can render a nice error message.
you cannot use action.time, because params is a Hash, not an object.
if you want to build an array to render later, you can use inject.
if you would like to have some atomicity to this (either everything is created or nothing!), you can wrap the whole thing in a transaction block.
It's worth mentioning that I haven't tested the code above, but it should give you a direction and (maybe) it will be a drop-in replacement.
Hope that helps!
I am calling below method in an ajax call. I expect this method to return me an array so that I can loop through in my ajax call for a desired result.
Normally we render partial or text . i am not sure how to render an array. could some one please help me out . I know that render text: for arrays will not work .
def get
#bookmarks = Project.get(params[:username])
render text: #bookmarks
end
You should render it as a JSON object:
def get
#bookmarks = Project.get(params[:username])
render json: #bookmarks.to_json
end
I am trying to autocomplete a search, the only issues is i am fetching two information. I am following the tutorial here http://railscasts.com/episodes/102-auto-complete-association-revised
Here the issues
def index
#titles = Event.order(:title).where("title like ?", "%#{params[:term]}%")
#customers = Customer.order(:first_name).where("first_name like ?", "%#{params[:term]}%")
render json: #titles.map(&:title)
render json: #customers.map(&:title)
end
If both contain something how can i return both objects.
You have to create a single JSON object which contains both information, like this:
respond_to do |format|
format.json { render json: {titles: #titles.map(&:title), customers: #customers.map(&:title)} }
end
Haven't tested it, but it should work.