PullMonkey Blog

25 Jul

Using a database to populate an Open Flash Chart graph


Just got Archie Smuts comment asking how to populate a Open Flash Chart graph using results from a database.



Just for reference, the code that follows represents this graph:







Examples for version 2 are here.




Using the new version of Open Flash Chart, here is an example for you to follow:

  • Start a rails app and install the plugin per these instructions.
  • The results table that I am working with has these rows:

    1
    2
    3
    4
    5
    6
    
    
    Result.create(:student_name => "Jack", :subject => "History", :test_score => 97
    Result.create(:student_name => "Jack", :subject => "Science", :test_score => 85)
    Result.create(:student_name => "Jill", :subject => "History", :test_score => 92)
    Result.create(:student_name => "Jill", :subject => "Science", :test_score => 57)
    
    
  • Create a controller, mine is test_it:

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    
    
    class TestItController < ApplicationController
      def index
        @graph = open_flash_chart_object(600,300,"/test_it/graph_code")
      end
    
      def graph_code
        # we will have bars for each student subject combo
        bars   = []
    
        # random colors to chose from
        colours = ["#459a89", "#9a89f9"]
    
        # the results
        results = Result.find(:all)
    
        # group by subject and use subject as the key
        results.group_by(&:subject).each do |subject, result|
          # 3d bar graph, could be any bar graph though
          bar = Bar3d.new
          bar.set_key(subject, 3)
          bar.colour = colours[bars.size]
          bar.values = result.map(&:test_score)
          bars << bar
        end
    
        # some title
        title = Title.new("Test Results")
    
        # labels along the x axis, just hard code for now, but you would want to dynamically do this
        x_axis = XAxis.new
        x_axis.labels = ["Jack", "Jill"]
    
        # go to 100% since we are dealing with test results
        y_axis = YAxis.new
        y_axis.set_range(0, 100, 10)
    
        # setup the graph
        graph = OpenFlashChart.new
        graph.bg_colour = '#ffffcc'
        graph.title = title
        graph.x_axis = x_axis
        graph.y_axis = y_axis
        graph.elements = bars
    
        render :text => graph.to_s
      end
    end
    
    
  • Create a view, mine is index.html.erb for the test_it controller:

    1
    2
    3
    4
    
    
    <script type="text/javascript" src="/javascripts/swfobject.js"></script>
    <%= @graph %>
    
    


  • Hope that helps.



    25 Responses to “Using a database to populate an Open Flash Chart graph”

    1. By Cecci on Jul 25, 2008 | Reply

      Hello, the first example worked. But in this example with database, I don’t know where it goes or where I create the first part: result.create(…) The others, know: view and controller, but this I don’t know

    2. By charlie on Jul 25, 2008 | Reply

      @Cecci - good question :) When I did it, I opened up script/console and ran each line one at a time. You could also place it in a migration if you wish.

    3. By Cecci on Jul 25, 2008 | Reply

      Hi, It worked! Thank you… Now I am trying to do the graph of pie, but I do not know that receives |open_flash_chart_object()| I do not know where from are those folders. Might you make clear to me that it receives?

      Sorry, but I don’t speak english very well

    4. By charlie on Jul 25, 2008 | Reply

      @Cecci - Sorry but I am not exactly clear what you are after, but this example of a pie chart may help - http://pullmonkey.com/2008/7/29/open-flash-chart-ii-pie-chart

      Also, you may want to know what parameters to pass to open_flash_chart_object(). It takes these parameters:
      open_flash_chart_object(width, height, url, use_swfobject, base)
      o width is the px width of the graph
      o height is the px height of the graph
      o url is the path to your graph_code action
      o use_swfobject is always true, it is legacy and used to determine if you were going to use the javascript swfobject.js or not
      o base is the path to your open-flash-chart.swf file if it is not right under your RAILS_ROOT/public directory

      The file that contains the code is under:
      RAILS_ROOT/vendor/plugins/open_flash_chart/lib/open_flash_chart_object.rb

    5. By Nathan Leavitt on Jul 25, 2008 | Reply

      Hey… So I have a collection of payments with two different months (Oct 07 and Aug 08). I’m trying to get a collection for each month graphed. Everything is working great except the fact that I have to bars for each month. Both have the right values but I just need on bar for each month. Please help.

      <filter:code attributes=lang="ruby">
      def graph_code
      # we will have bars for each student subject combo
      bars = []
      months = []
      monthly_totals =[]

      # random colors to chose from
      colours = ["#459a89", "#9a89f9"]

      # the results
      @payments = Payment.find(:all, :conditions => {
      :account_id => current_account.id,
      :created_at => (11.months.ago.beginning_of_month..Time.now)
      })

      # group by subject and use subject as the key
      @payments.group_by(&:month).each do |month, payments|
      month_total = 0
      for payment in payments
      month_total += payment.amount
      end
      monthly_totals << month_total

      # 3d bar graph, could be any bar graph though
      bar = Bar3d.new
      # bar.set_key(month, 3)
      bar.colour = "#459a89"
      bar.values = monthly_totals
      bars << bar
      months << month
      end
      @max = monthly_totals.max.to_i + 100 - (monthly_totals.max.to_i % 100)

      # some title
      title = Title.new("Payments")

      # labels along the x axis, just hard code for now, but you would want to dynamically do this
      x_axis = XAxis.new
      x_axis.labels = months

      # go to 100% since we are dealing with test results
      y_axis = YAxis.new
      y_axis.set_range(0, @max, @max/10)

      # setup the graph
      graph = OpenFlashChart.new
      graph.bg_colour = ‘#ffffff’
      graph.title = title
      graph.x_axis = x_axis
      graph.y_axis = y_axis
      graph.elements = bars

      render :text => graph.to_s

      end
      < /filter:code>

    6. By Nathan Leavitt on Jul 25, 2008 | Reply

      Oops…here it is:

      <filter:code attributes=lang="ruby">
      def graph_code
      # we will have bars for each student subject combo
      bars = []
      months = []
      monthly_totals =[]

      # random colors to chose from
      colours = ["#459a89", "#9a89f9"]

      # the results
      @payments = Payment.find(:all, :conditions => {
      :account_id => current_account.id,
      :created_at => (11.months.ago.beginning_of_month..Time.now)
      })

      # group by subject and use subject as the key
      @payments.group_by(&:month).each do |month, payments|
      month_total = 0
      for payment in payments
      month_total += payment.amount
      end
      monthly_totals << month_total

      # 3d bar graph, could be any bar graph though
      bar = Bar3d.new
      # bar.set_key(month, 3)
      bar.colour = "#459a89"
      bar.values = monthly_totals
      bars << bar
      months << month
      end
      @max = monthly_totals.max.to_i + 100 - (monthly_totals.max.to_i % 100)

      # some title
      title = Title.new("Payments")

      # labels along the x axis, just hard code for now, but you would want to dynamically do this
      x_axis = XAxis.new
      x_axis.labels = months

      # go to 100% since we are dealing with test results
      y_axis = YAxis.new
      y_axis.set_range(0, @max, @max/10)

      # setup the graph
      graph = OpenFlashChart.new
      graph.bg_colour = ‘#ffffff’
      graph.title = title
      graph.x_axis = x_axis
      graph.y_axis = y_axis
      graph.elements = bars

      render :text => graph.to_s

      end
      </filter:code>

    7. By Nathan Leavitt on Jul 25, 2008 | Reply

      Actually… I just solved it. I guess I only need to make one bar instance. I was assuming I needed to create a bar for each month. So I pulled out the bar from the loop. Now it looks like this:

      <filter:code attributes=lang="ruby">
      # group by subject and use subject as the key
      @payments.group_by(&:month).each do |month, payments|
      month_total = 0
      for payment in payments
      month_total += payment.amount
      end
      monthly_totals << month_total

      months << month
      end

      # 3d bar graph, could be any bar graph though
      bar = Bar3d.new
      # bar.set_key(month, 3)
      bar.colour = "#459a89"
      bar.values = monthly_totals
      bars << bar
      </filter:code>

    8. By Ganesh on Jul 25, 2008 | Reply

      {"y_axis": {"steps": 10, "max": 100, "min": 0}, "title": {"text": "Test Results"}, "elements": [{"text"

      : "Anti-Money Laundering (WestLB)", "type": "bar_3d", "colour": "#459a89", "values": "10", "font-size"

      : "4"}, {"text": "Conflicts of Interest", "type": "bar_3d", "colour": "#9a89f9", "values": "12", "font-size"

      : "4"}, {"text": "Anti-Money Laundering Training", "type": "bar_3d", "colour": "#9a89f9", "values": "51"

      , "font-size": "4"}, {"text": "Compliance Essentials", "type": "bar_3d", "colour": "#9a89f9", "values"

      : "50", "font-size": "4"}], "bg_colour": "#ffffcc"}

    9. By Petros on Jul 25, 2008 | Reply

      I am trying to use this plugin, but the chart is not loading. I did everything i found in these places but nothing.

      downloaded plugin in vendor/plugins
      i copied the flash file to public and the javascript in public/javascripts/…
      i put <% javascript_include_tag :all %> in the applications layout.

      ****Routes*****

      map.with_options :controller => ’stats’ do |t|
      t.monthly_graph ‘/:id/monthly_graph’, :action => ‘monthly_graph’
      t.yearly_graph ‘/:id/yearly_graph’, :action => ‘yearly_graph’
      t.statistics ‘/statistics/:id’, :action => :show
      end

      *** stats controller ***

      class StatsController < ApplicationController

      def show
      @post = Post.find(params[:id])
      session[:time] ||= Time.now
      @m_graph = open_flash_chart_object(550, 400, monthly_graph_path(@post.id))

      end

      def monthly_graph
      @post = Post.find(params[:id])
      session[:time] ||= Time.now
      title = Title.new("Κόστος καταχώρησης ανά μήνα")

      media_costs=[]
      media_titles =[]

      media_counts=[]

      Media.find :all, :order => "title" do |media|
      costs=[]
      counts=[]
      (1..days_in_month(session[:time].year, session[:time].month)).each do |day|
      costs << media.trades.sum(:cost, :conditions => "created_at between ‘#{DateTime.new(session[:time].year, session[:time].month, day).to_formatted_s(:db)}’ AND ‘#{(DateTime.new(session[:time].year, session[:time].month, day) + 1.day).to_formatted_s(:db)}’")
      counts << media.trades.count(:conditions => "created_at between ‘#{DateTime.new(session[:time].year, session[:time].month, day).to_formatted_s(:db)}’ AND ‘#{(DateTime.new(session[:time].year, session[:time].month, day) + 1.day).to_formatted_s(:db)}’")
      end
      media_costs << costs
      media_counts << counts
      media_title << media.title
      end

      lines =[]
      media_costs.each_with_index do |x, index|
      lines[index] = LineDot.new
      lines[index].text = media_titles[index]
      lines[index].width = 4
      lines[index].colour = ‘#6363AC’
      lines[index].values = x
      end

      y = YAxis.new
      y.set_range(0,10000,5)

      x_legend = XLegend.new("Ημέρες")
      x_legend.set_style(’{font-size: 20px; color: #778877}’)

      y_legend = YLegend.new("Κόστος")
      y_legend.set_style(’{font-size: 20px; color: #770077}’)

      tmp = []
      (0..days_in_month(session[:time].year, session[:time].month)).to_a.each do |x|
      tmp << x
      end

      chart = OpenFlashChart.new
      chart.set_title(title)
      chart.set_x_legend(x_legend)
      chart.set_y_legend(y_legend)
      chart.y_axis = y

      lines.each {|x| chart.add_element(x)}

      render :text => chart.to_s

      end

      *** VIEW show.html.erb ****

      <%= @m_graph %>

      I am using rails 2.2.2 but i tried older version but nothing the flash doesn’t render

      Can anynone help?

    10. By charlie on Jul 25, 2008 | Reply

      @Pedros - Your implementation looks good. Any javascript errors. You need the <%= for your javascript_include_tag

      <%= javascript_include_tag :all %>

    11. By Dalf on Jul 25, 2008 | Reply

      Hi,
      I tried this code but the chart doesn’t show up, I just have a "white" screen (no error message).
      Here is my chart.to_s :
      <filter:code attributes=lang="json">
      {"y_axis": {"steps": 10, "max": 100, "min": 0}, "title": {"text": "Test Results"}, "elements": [{"text": "history", "type": "bar_3d", "colour": "#459a89", "font-size": 3, "values": [85, 78]}], "x_axis": {"labels": {"labels": ["Jack"]}}, "bg_colour": "#ffffcc"}
      < /filter:code>

      Is my chart.to_s valid ?

      I also tried with what Ganesh said above => same result…

      Does anyone has any idea?

    12. By WIehann on Jul 25, 2008 | Reply

      For some strange reason the values of my y-axis labels doesn’t display. I don’t specifically set any labels for Y-axis like I do for X-axis (x_labels = XAxisLabels.new). Is this needed for Y-axis or should it display the values set by y.set_range(min, max, step)?

      Thank You.

      <filter:code attributes=lang="ruby">
      def progression
      # person id is
      if params[:person_id]
      person_id = params[:person_id].to_i
      else
      person_id = session[:loginuser].id
      end
      person = Person.find(person_id)

      # data values (points)
      quarter = Point.find(:all, :conditions => {:userlogin_id => person_id, :year => ‘09′})
      points = quarter.map{ |r| r.points }

      # build line
      title = Title.new("Your Progression")
      line = Line.new
      line.set_tooltip("<br>qty = #val#")
      line.width = 2
      line.colour = "#597AFF"
      line.dot_size = 5
      line.values = points

      x_labels = XAxisLabels.new
      x_labels.set_vertical()
      labels = []
      labels << XAxisLabel.new("08", ‘#BBBBE3′, 16, ‘horizontal’)
      labels << XAxisLabel.new("Q1", ‘#BBBBE3′, 16, ‘horizontal’)
      labels << XAxisLabel.new("Q2", ‘#BBBBE3′, 16, ‘horizontal’)
      labels << XAxisLabel.new("Q3", ‘#BBBBE3′, 16, ‘horizontal’)
      labels << XAxisLabel.new("Q4", ‘#BBBBE3′, 16, ‘horizontal’)
      x_labels.labels = labels

      x = XAxis.new
      x.set_labels(x_labels)
      x.colour = "#E8E8E8"
      x.grid_colour = "#E8E8E8"

      y = YAxis.new
      y.colour = "#E8E8E8"
      y.grid_colour = "#E8E8E8"

      # This sets min, max and step for y-axis
      min = data.min { |a, b| a <=> b }
      max = data.max { |a, b| a <=> b }
      step = (max-min)/10
      min -= step unless min == 0
      max += step
      if max == min
      max = 100
      min =0
      step = 20
      end
      y.set_range(min, max, step)

      x_legend = XLegend.new("Quarters")
      x_legend.set_style(’{font-size: 22px; color: #E3BBD8}’)

      y_legend = YLegend.new("Points")
      y_legend.set_style(’{font-size: 22px; color:#E3BBD8}’)

      chart = OpenFlashChart.new
      chart.bg_colour = ‘#FFFFFF’
      chart.title = title
      chart.set_x_legend(x_legend)
      chart.set_y_legend(y_legend)
      chart.x_axis = x
      chart.y_axis = y

      chart.add_element(line)
      render :text => chart.to_s

      end
      </filter:code>

    13. By charlie on Jul 25, 2008 | Reply

      @Dalf - just for comparison, this is my chart.to_s:
      <filter:code>
      {"y_axis": {"steps": 10, "max": 100, "min": 0}, "title": {"text": "Test Results"}, "elements": [{"text": "History", "type": "bar_3d", "colour": "#459a89", "values": [97, 92], "font-size": 3}, {"text": "Science", "type": "bar_3d", "colour": "#9a89f9", "values": [85, 57], "font-size": 3}], "x_axis": {"labels": {"labels": ["Jack", "Jill"]}}, "bg_colour": "#ffffcc"}
      </filter:code>

      Other than your missing label and bar, they look the same to me. Do you have javascript enabled? Do you have the swfobject.js loaded? What is the generated HTML for the page? Did you render :text => chart.to_s? If you think of anything let me know.

    14. By charlie on Jul 25, 2008 | Reply

      @WIehann - Maybe your color choice is too faint compared to your background color? What swf file are you using? The bundled one or the new one. Everything looks fine from here. What is the JSON output (chart.to_s)? What is the generated HTML?

    15. By Enno on Jul 25, 2008 | Reply

      @Pedros I had a similar problem when i used a rails helper for the url.

      Assume that you have something like this in your controller action:

      <filter:code attributes=lang="ruby">
      # results_bar_chart_path(@result) returns /result/1/bar_chart
      @chart = ofc2(600,300,bar_chart_path(@result))
      < /filter:code>

      The problem is that ofc2 assumes by default to be "/" the base directoy and appends the url to it, which will result in //result/1/bar_chart
      To fix this, just pass an empty string as fourth param like this:

      <filter:code attributes=lang="ruby">
      # in your controller action
      # results_bar_chart_path(@result) returns /result/1/bar_chart
      @chart = ofc2(600,300,bar_chart_path(@result),"")
      < /filter:code>

      You may have already fixed the problem, but I hope that it will help anyone who runs into this problem.

    16. By Enno on Jul 25, 2008 | Reply

      I’ve got to excuse me because i’ve mistaken the plugin that is discussed here with this one:
      http://openflashchart2.sentor.pl/

      Sorry for that.

    17. By Andrew on Jul 25, 2008 | Reply

      Hi, thanks for the great charts.

      I’m having trouble with the database example. I’ve inserted the results into a Mysql database and have a results migration.

      At http://localhost:3000/test_it/ I get the following;

      Open Flash Chart
      IO ERROR
      Loading test data
      Error #2032
      This is the URL that I tried to open:/test_it/graph_code

      And at http://localhost:3000/test_it/graph_code I get;

      uninitialized constant TestItController::Result
      RAILS_ROOT: /home/andrew/Projects/ofc2_test_app

      Any help is greatly appreciated. I’ve been working through it for a few days now.

      Andrew

    18. By Ryan on Jul 25, 2008 | Reply

      I am having trouble displaying data from a database. I am trying to loop through my "Asset_Types table and display the count of the nmber of assets that belong to each asset_type.

      Can someone please point me in the right direction?

      <filter:code attributes=lang="ruby">
      def graphcode
      # we will have bars for each student subject combo
      bars = []

      # random colors to chose from
      colours = ["#459a89", "#9a89f9"]

      # the results
      results = AssetType.all :order => "name"

      results.each do |at|
      bar = Bar3d.new
      bar.set_key(at.name, 2) #the number is the fone size
      bar.values = at.assets.count
      bars << bar
      end

      # some title
      title = Title.new("Assets by Type")

      # labels along the x axis, just hard code for now, but you would want to dynamically do this
      x_axis = XAxis.new
      x_axis.labels = ["Jack", "Jill"]

      # go to 100% since we are dealing with test results
      y_axis = YAxis.new
      y_axis.set_range(0, 500, 10)

      # setup the graph
      graph = OpenFlashChart.new
      graph.bg_colour = ‘#ffffcc’
      graph.title = title
      graph.x_axis = x_axis
      graph.y_axis = y_axis
      graph.elements = bars

      render :text => graph.to_s
      end
      < /filter:code>

      The relevant json that is being generated is:

      {"y_axis": {"steps": 10, "max": 500, "min": 0}, "title": {"text": "Assets by Type"}, "elements": [{"text": "Adviser Central", "type": "bar_3d", "values": 2, "font-size": 2}, {"text": "BES Server", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Backup", "type": "bar_3d", "values": 1, "font-size": 2}, {"text": "Backup Tape Drive", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Blackberry", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Camera", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "DHCP", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Database Server", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Desktop", "type": "bar_3d", "values": 136, "font-size": 2}, {"text": "Domain Name Hosting", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Domain Name Registration", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Email Server", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Email Server", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Fax", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Firewall", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Internal Domain", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Internet Service Provider", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Label Printer", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Laptop", "type": "bar_3d", "values": 14, "font-size": 2}, {"text": "Leap", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Linux", "type": "bar_3d", "values": 6, "font-size": 2}, {"text": "MDF", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "ManagePoint", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Other", "type": "bar_3d", "values": 7, "font-size": 2}, {"text": "Other", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Printer", "type": "bar_3d", "values": 24, "font-size": 2}, {"text": "Router/Modem", "type": "bar_3d", "values": 16, "font-size": 2}, {"text": "Scanner", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "StorageCraft", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Switch", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Trendmicro Antivirus", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Trixbox", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "UPS", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Web Hosting", "type": "bar_3d", "values": 0, "font-size": 2}, {"text": "Website", "type": "bar_3d", "values": 6, "font-size": 2}, {"text": "Windows", "type": "bar_3d", "values": 29, "font-size": 2}, {"text": "iPhone", "type": "bar_3d", "values": 0, "font-size": 2}], "x_axis": {"labels": {"labels": ["Jack", "Jill"]}}, "bg_colour": "#ffffcc"}

    19. By Nithin Bekal on Sep 22, 2009 | Reply

      Hi. I wan wondering how I could send some parameters to the graph_code method. For example, if I wanted to send a parameter called ‘year’, I could send it this way:

      @graph = open_flash_chart_object(600, 300,”/test_it/graph_code?year=2008″)

      But is there a better way to do this?

    20. By Ting on Dec 6, 2009 | Reply

      Works locally, but failed on http://strongsummer.heroku.com/test_it
      ===================================

      This app looks good!

      I implemented 3 graphs ( first graph, pie chart and test result) on 1 page.

      Runs fine locally on rails. But test result gave an error deployed on heroku (The other 2 graph looks fine.) here :- http://strongsummer.heroku.com/test_it

      Error message :
      Open Flash Chart
      IO ERROR
      Loading test data
      Error #2032
      This is the URL that I tried to open:/test_it/graph_three

      I’d suspect this may be a flash link to or database error. I changed a few parameters in database.yml but to no avail. (Now i am just sticking to what i know is the best working config here from previous.) :-

      development:
      adapter: sqlite3
      database: db/development.sqlite3
      pool: 5
      timeout: 5000

      test:
      adapter: sqlite3
      database: db/test.sqlite3
      pool: 5
      timeout: 5000

      production:
      adapter: postgresql
      database: db/development.sqlite3
      pool: 5
      timeout: 5000

      Basically, i did a
      > rake db:setup
      > rake db:migrate
      > rake db:seed

      and the git and heroku commands.

      Any advice would be good!

      Thanks!

    21. By Ting on Dec 6, 2009 | Reply

      These changes have the same result.

      development:
      adapter: sqlite3
      database: db/allresults.db
      pool: 5
      timeout: 5000

      production:
      adapter: postgresql
      database: db/allresults.db
      pool: 5
      timeout: 5000

    22. By charlie on Dec 6, 2009 | Reply

      What’s the error in the log?

    23. By Ting on Dec 6, 2009 | Reply

      Thanks for asking charlie!

      The problem is solved in 2 steps :-
      > gem install taps
      > heroku db:push (As advised by heroku staff)

      http://strongsummer.heroku.com/test_it is working fine now :)

    24. By xue on Jan 13, 2011 | Reply

      Hi,
      how are you setting the tooltip like that (with the xlabel and value)? Is it automatic? I’m just making a simple bar chart and #x_label# is not working, so I was wondering if there is a workaround. Thanks

    25. By Constance on Sep 23, 2012 | Reply

      Learnnig a ton from these neat articles.

    Sorry, comments for this entry are closed at this time.