Add demo rake task for populating PhenotypeSnp table

Signed-off-by: Vivek Rai <vivekrai.iitkgp@gmail.com>

lib/tasks/phenotype_snp.rake

@@ -0,0 +1,16 @@
+namespace :custom do
+  desc 'Adding custom data to Phenotype SNP table'
+  task :snp_link => :environment do
+    @snps = Snp.find_by_name('rs4475691')
+    @phenotype = Phenotype.create :characteristic => 'Brown'
+    PhenotypeSnp.create :snp => @snps, :phenotype => @phenotype, :score => 5
+
+    @snps = Snp.find_by_name('rs3890745')
+    @phenotype = Phenotype.create :characteristic => 'Arthritis'
+    PhenotypeSnp.create :snp => @snps, :phenotype => @phenotype, :score => 7
+
+    @snps = Snp.find_by_name('rs2651899')
+    @phenotype = Phenotype.create :characteristic => 'Migrain'
+    PhenotypeSnp.create :snp => @snps, :phenotype => @phenotype, :score => 6
+  end
+end