Creation of the Molecule model

app/models/molecule.rb

+class Molecule < ActiveRecord::Base
+  belongs_to :sample
+
+  validates_uniqueness_of :inchikey
+end

db/migrate/20150817200859_create_molecules.rb

+class CreateMolecules < ActiveRecord::Migration
+  def change
+    create_table :molecules do |t|
+      t.integer :sample_id
+      t.string :inchikey
+      t.string :inchistring
+      t.float :density
+      t.float :molecular_weight
+      t.binary :molfile
+      t.float :melting_point
+      t.float :boiling_point
+      t.string :sum_formular
+      t.string :names, array: true, default: []
+      t.string :iupac_name
+      t.string :molecule_svg_file
+
+      t.timestamps null: false
+    end
+
+    add_index :molecules, :inchikey, unique: true
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150817085601) do
+ActiveRecord::Schema.define(version: 20150817200859) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -49,6 +49,25 @@ ActiveRecord::Schema.define(version: 20150817085601) do
   add_index "collections_samples", ["collection_id"], name: "index_collections_samples_on_collection_id", using: :btree
   add_index "collections_samples", ["sample_id"], name: "index_collections_samples_on_sample_id", using: :btree
 
+  create_table "molecules", force: :cascade do |t|
+    t.integer  "sample_id"
+    t.string   "inchikey"
+    t.string   "inchistring"
+    t.float    "density"
+    t.float    "molecular_weight"
+    t.binary   "molfile"
+    t.float    "melting_point"
+    t.float    "boiling_point"
+    t.string   "sum_formular"
+    t.string   "names",             default: [],              array: true
+    t.string   "iupac_name"
+    t.string   "molecule_svg_file"
+    t.datetime "created_at",                     null: false
+    t.datetime "updated_at",                     null: false
+  end
+
+  add_index "molecules", ["inchikey"], name: "index_molecules_on_inchikey", unique: true, using: :btree
+
   create_table "reactions", force: :cascade do |t|
     t.string   "name"
     t.datetime "created_at", null: false