Class: RailsErdD3

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_erd_d3.rb

Class Method Summary collapse

Class Method Details

.create ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 45

def self.create
  Rails.application.eager_load!

  file = File.new("erd.html", "w")
  file.write(
    "<!DOCTYPE HTML>"\
    "<html>"\
      "#{get_head}"\
      "<body>"\
        "#{get_nav}"\
        "<div id='erd'>"\
        "</div>"\
        "#{get_d3}"\
        "#{get_modals}"\
      "</body>"\
    "</html>"
  )
  file.close

  "File erd.html was successfully created!"
end

.get_all_models ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 8

def self.get_all_models
  version = get_rails_version

  case get_rails_version
  when 4
    klass = ActiveRecord::Base
  when 5
    klass = ApplicationRecord
  end

  @@models = ObjectSpace.each_object(Class).select { |o| o.superclass == klass } || []
end

.get_d3 ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 103

def self.get_d3
  "<script>
var data = #{get_data};

var width = window.innerWidth
  || document.documentElement.clientWidth
  || document.body.clientWidth;
var height = window.innerHeight
  || document.documentElement.clientHeight
  || document.body.clientHeight;

var colorScale = d3.scaleOrdinal(d3.schemeCategory20);

var svg = d3.select('#erd').append('svg')
  .attr('height', height)
  .attr('width', width)
  .style('background', 'white');

var simulation = d3.forceSimulation()
  .force('link', d3.forceLink().id(function(d) { return d.index }))
  .force('collide',d3.forceCollide( function(d){return d.r + 20 }).iterations(30) )
  .force('charge', d3.forceManyBody())
  .force('center', d3.forceCenter(width / 2, height / 2))
  .force('y', d3.forceY(0))
  .force('x', d3.forceX(0));

var link = svg.append('g')
  .classed('links', true)
  .selectAll('line')
  .data(data.links)
  .enter()
  .append('line')
  .attr('stroke', 'black');

var node = svg.selectAll('.node')
  .data(data.nodes)
  .enter()
  .append('g')
  .classed('node', true)
  .style('cursor', 'pointer')
  .attr('data-toggle', 'modal')
  .attr('data-target', function(d, i){ return '#' + data.nodes[i].label })
  .call(d3.drag()
    .on('start', dragstarted)
    .on('drag', dragged)
    .on('end', dragended));

node.append('circle')
  .classed('circle', true)
  .attr('r', function(d){  return d.r })
  .attr('fill', function(d, i){ return colorScale(i) });

node.append('text')
  .classed('text', true)
  .text(function(d) {
    return d.label;
  });

var ticked = function() {
    link
      .attr('x1', function(d) { return d.source.x; })
      .attr('y1', function(d) { return d.source.y; })
      .attr('x2', function(d) { return d.target.x; })
      .attr('y2', function(d) { return d.target.y; });

    node
      .attr('transform', function(d) {
        return 'translate(' + [d.x, d.y] + ')';
      });
}

simulation.nodes(data.nodes)
    .on('tick', ticked);

simulation.force('link')
    .links(data.links);

function dragstarted(d) {
    if (!d3.event.active) simulation.alphaTarget(0.3).restart();
    d.fx = d.x;
    d.fy = d.y;
}

function dragged(d) {
    d.fx = d3.event.x;
    d.fy = d3.event.y;
}

function dragended(d) {
    if (!d3.event.active) simulation.alphaTarget(0);
    d.fx = null;
    d.fy = null;
}
</script>
"
end

.get_data ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 21

def self.get_data
  get_all_models

  models_list = {}
  @@models.each_with_index do |model, index|
    models_list[model.model_name.plural.capitalize] = index
  end

  nodes = []
  links = []
  @@models.each do |model|
    nodes << { label: model.name.capitalize, r: 30 }
    model.reflections.keys.each do |key|
      links << {
        source: models_list[model.model_name.plural.capitalize],
        target: models_list[key.pluralize.capitalize]
      }
    end
  end

  data = { nodes: nodes, links: links }
  data.to_json
end

.get_head ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 69

def self.get_head
  "<head>"\
    "<title>ERD</title>"\
    "<meta charset='utf-8'>"\
    "<script   src='https://code.jquery.com/jquery-3.1.1.min.js' integrity='sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8=' crossorigin='anonymous'></script>"\
    "<script src='https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'></script>"\
    "<script src='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js' integrity='sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa' crossorigin='anonymous'></script>"\
    "<link rel='stylesheet' href='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css' integrity='sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u' crossorigin='anonymous'>"\
  "</head>"
end

.get_modals ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 200

def self.get_modals
  modals = ""
  @@models.each do |model|
    name = model.model_name.plural.capitalize
    modals += "<div class='modal fade' id='#{name}' tabindex='-1' role='dialog'>"\
                "<div class='modal-dialog' role='document'>"\
                  "<div class='modal-content'>"\
                    "<div class='modal-header'>"\
                      "<button type='button' class='close' data-dismiss='modal' aria-label='Close'><span aria-hidden='true'>&times;</span></button>"\
                      "<h4 class='modal-title'>#{name}</h4>"\
                    "</div>"\
                    "<div class='modal-body'>"\
                      "<table class='table table-hover'>"\
                        "<thead>"\
                          "<tr>"\
                            "<th>#</th>"\
                            "<th>name</th>"\
                            "<th>macro</th>"\
                            "<th>foreign_key</th>"\
                          "</tr>"\
                        "</thead>"\
                        "<tbody>"

    model.reflections.each_with_index do |r, index|
      name = r[0]
      modals += "<tr>"\
                  "<th>#{index + 1}</th>"\
                  "<td>#{name.capitalize}</td>"\
                  "<td>#{model.reflections[name].macro}</td>"\
                  "<td>#{model.reflections[name].foreign_key}</td>"\
                "</tr>"
    end

    modals += "</tbody>"
              "</table>"\
            "</div>"\
            "<div class='modal-footer'>"\
              "<button type='button' class='btn btn-default' data-dismiss='modal'>Close</button>"\
            "</div>"\
          "</div>"\
        "</div>"\
      "</div>"
end

  modals
end

.get_nav ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 80

def self.get_nav
  "<nav class='navbar navbar-default' style='background-color: #337ab7;'>"
    "<div class='container'>"\
      "<div class='navbar-header'>"\
        "<div class='navbar-brand'>"\
          "<a href='https://github.com/RomanKrasavtsev/rails-erd-d3' target='_blank' style='color: white;'>"\
            "Rails-ERD-D3"\
          "</a>"\
        "</div>"\
      "</div>"\
      "<div class='collapse navbar-collapse'>"\
        "<ul class='nav navbar-nav navbar-right'>"\
          "<li>"\
            "<a href='https://github.com/romankrasavtsev' target='_blank' style='color: white;'>"\
              "&copy; 2016 Roman Krasavtsev"\
            "</a>"\
          "</li>"\
        "</ul>"\
      "</div>"\
    "</div>"\
  "</nav>"
end

.get_rails_version ⇒ Object 



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# File 'lib/rails_erd_d3.rb', line 4

def self.get_rails_version
  Rails::VERSION::MAJOR
end