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# /tweets?status=Message...
# params = {status: "Message..."}
@tweet = Tweet.create(status: params[:status])

# /tweets?tweet[status]=Message...
# params = {tweet: {status: "Message..."}}
@tweet = Tweet.create(status: params[:tweet][:status])
@tweet = Tweet.create(params[:tweet])

# Strong parameters required only for creating or updating
@tweet = Tweet.create(params.require(:tweet).permit(:status))
# For multiple params
params.require(:tweet).permit([:status, :location])

# Flash and redirect shortcut
redirect_to(tweets_path, notice: "You can't do that.")

# Keep tweet retrieval DRY
before_action :get_tweet, only: [:edit, :update, :destroy]
def get_tweet
    @tweet = Tweet.find(params[:id])
end

# Keep user authorization DRY
before_action :check_auth, only: [:edit, :update, :destroy]
def check_auth
    if session[:user_id] != @tweet.user.id
        flash[:notice] = "You can't do that."
        redirect_to tweets_path
    end
end

# Display params in JSON and XML format
def show
    @user = User.find(params[:id])
    respond_to do |format|
        format.html
        format.json { render json: @user }
        format.xml { render xml: @user }
    end
end