Validate controller params

app/controllers/case_logs_controller.rb

@@ -7,10 +7,16 @@ class CaseLogsController < ApplicationController
   end
 
   def create
-    @case_log = CaseLog.create!(create_params)
+    @case_log = CaseLog.create(create_params)
     respond_to do |format|
       format.html { redirect_to @case_log }
-      format.json { render json: @case_log }
+      format.json do
+        if @case_log.persisted?
+          render json: @case_log , status: :created
+        else
+          render json: { errors: @case_log.errors.full_messages }, status: :unprocessable_entity
+        end
+      end
     end
   end
 

app/models/case_log.rb

@@ -5,22 +5,28 @@ class CaseLogValidator < ActiveModel::Validator
 
   def validate_tenant_code(record)
     if record.tenant_code.blank?
-      record.errors.add :tenant_code, "Tenant code can't be blank"
+      # record.errors.add :tenant_code, "Tenant code can't be blank"
     end
   end
 
   def validate_tenant_age(record)
-    if record.tenant_age.blank?
-      record.errors.add :tenant_age, "Tenant age can't be blank"
-    elsif !/^[1-9][0-9]?$|^100$/.match?(record.tenant_age.to_s)
+    # if record.tenant_age.blank?
+    #   record.errors.add :tenant_age, "Tenant age can't be blank"
+    # elsif !/^[1-9][0-9]?$|^100$/.match?(record.tenant_age.to_s)
+    #   record.errors.add :tenant_age, "Tenant age must be between 0 and 100"
+    # end
+    if record.tenant_age && !/^[1-9][0-9]?$|^100$/.match?(record.tenant_age.to_s)
       record.errors.add :tenant_age, "Tenant age must be between 0 and 100"
     end
   end
 
   def validate(record)
     question_to_validate = options[:previous_page]
-    if respond_to?("validate_#{question_to_validate}")
+    if question_to_validate && respond_to?("validate_#{question_to_validate}")
       public_send("validate_#{question_to_validate}", record)
+    else
+      validation_methods = public_methods(false) - [__callee__]
+      validation_methods.each { |meth| public_send(meth, record) }
     end
   end
 end

spec/requests/case_log_controller_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe CaseLogsController, type: :request do
     let(:params) do
       {
         "tenant_code": tenant_code,
-        "tenant_age": 35,
+        "tenant_age": tenant_age,
         "property_postcode": property_postcode
       }
     end
@@ -40,5 +40,15 @@ RSpec.describe CaseLogsController, type: :request do
       expect(json_response["tenant_age"]).to eq(tenant_age)
       expect(json_response["property_postcode"]).to eq(property_postcode)
     end
+
+    context "invalid json params" do
+      let(:tenant_age) { 2000 }
+
+      it "validates case log parameters" do
+        json_response = JSON.parse(response.body)
+        expect(response).to have_http_status(:unprocessable_entity)
+        expect(json_response["errors"]).to eq(["Tenant age Tenant age must be between 0 and 100"])
+      end
+    end
   end
 end