change database from h2 to postgres

1. fix bug in create-ratings!
2. improve query efficiency in get-movie-average
3. change migration files

Author: humorless

Diff for: README.md

@@ -1,4 +1,4 @@
-# intowow
+# spark-movie-lens
 
 generated using Luminus version "2.9.11.90"
 
@@ -8,17 +8,11 @@ generated using Luminus version "2.9.11.90"
 lein migratus migrate
 ```
 
-## Database Debug: invoke DB web console
-```
-wget http://repo2.maven.org/maven2/com/h2database/h2/1.4.196/h2-1.4.196.jar
-java -cp h2*.jar org.h2.tools.Server -webAllowOthers
-```
-
 ## Prerequisites
 
-You will need [Leiningen][1] 2.0 or above installed.
-
-Install libraries needed for spark.
+1. You will need [Leiningen][1] 2.0 or above installed.
+2. You will need to instll postgresql.
+3. Install libraries needed for spark.
 
 ```
 sudo apt-get install libgfortran3

Diff for: profiles.clj

@@ -1,2 +1,2 @@
-{:profiles/dev  {:env {:database-url "jdbc:h2:./intowow_dev.db"}}
- :profiles/test {:env {:database-url "jdbc:h2:./intowow_test.db"}}}
+{:profiles/dev  {:env {:database-url "jdbc:postgresql://localhost/intowow_dev?user=intowow&password=qwerty"}}
+ :profiles/test {:env {:database-url "jdbc:postgresql://localhost/intowow_test?user=intowow&password=qwerty"}}}

Diff for: project.clj

@@ -4,11 +4,13 @@
   :url "https://github.com/humorless/spark-movie-lens"
 
   :dependencies [[gorillalabs/sparkling  "1.2.2"]
+                 [org.apache.spark/spark-mllib_2.10  "1.1.0" :exclusions  [com.google.guava/guava org.slf4j/slf4j-log4j12]]
+                 [org.apache.spark/spark-core_2.10  "1.1.0" :exclusions  [com.google.guava/guava com.thoughtworks.paranamer/paranamer org.slf4j/slf4j-log4j12]]
                  [buddy "1.3.0"]
                  [cheshire "5.8.0"]
                  [jarohen/chime "0.2.2"]
                  [clj-time "0.14.0"]
-                 [com.h2database/h2 "1.4.196"]
+                 [org.postgresql/postgresql "42.1.4"]
                  [compojure "1.6.0"]
                  [conman "0.6.9"]
                  [cprop "0.1.11"]
@@ -50,9 +52,7 @@
             [lein-immutant "2.1.0"]]
 
   :profiles
-  {:provided {:dependencies [[org.apache.spark/spark-mllib_2.10  "1.1.0" :exclusions  [com.google.guava/guava org.slf4j/slf4j-log4j12]]
-                             [org.apache.spark/spark-core_2.10  "1.1.0" :exclusions  [com.google.guava/guava com.thoughtworks.paranamer/paranamer org.slf4j/slf4j-log4j12]]]}
-   :uberjar {:omit-source true
+  {:uberjar {:omit-source true
              :aot :all
              :uberjar-name "intowow.jar"
              :source-paths ["env/prod/clj"]

Diff for: resources/migrations/20171002212917-add-users-table.up.sql

@@ -1,8 +1,7 @@
 CREATE TABLE users
-(id INT PRIMARY KEY auto_increment,
+(id SERIAL PRIMARY KEY,
  email VARCHAR(40),
  pass VARCHAR(300),
  sess UUID);
 --;;
-INSERT INTO PUBLIC.USERS(ID, EMAIL, PASS, SESS) VALUES
-(1000, '[email protected]', 'bcrypt+sha512$2e2c9e9e74c2242f02721247b78544ee$12$956dfdf3dad4eade193141b2c4e090d06a4c18a53736490c', '44e6b1b8-95ff-47c9-a9fd-4c4dabcfa1ce');              
+ALTER SEQUENCE users_id_seq RESTART WITH 1000;