Adds cross table maintainer_subject TG-156 #Review

resources/data/akamuschema.sql

@@ -111,7 +111,6 @@ CREATE TABLE IF NOT EXISTS `akamu`.`maintainer` (
   `password` VARCHAR(100) NOT NULL,
   `level` INT NOT NULL,
   `name` VARCHAR(45) CHARACTER SET 'utf8mb4',
-  `subject` INT UNSIGNED NULL,
   `university` INT UNSIGNED NOT NULL,
   `email` VARCHAR(45) NULL,
   `idmongo` VARCHAR(45) NULL,
@@ -120,11 +119,6 @@ CREATE TABLE IF NOT EXISTS `akamu`.`maintainer` (
   UNIQUE INDEX `login_UNIQUE` (`login` ASC),
   INDEX `fk_maintainer_1_idx` (`subject` ASC),
   UNIQUE INDEX `idmongo_UNIQUE` (`idmongo` ASC),
-  CONSTRAINT `fk_maintainer_subject`
-  FOREIGN KEY (`subject`)
-  REFERENCES `akamu`.`subject` (`idsubject`)
-    ON DELETE NO ACTION
-    ON UPDATE NO ACTION,
   CONSTRAINT `fk_maintainer_university`
   FOREIGN KEY (`university`)
   REFERENCES `akamu`.`university`(`iduniversity`)
@@ -132,6 +126,28 @@ CREATE TABLE IF NOT EXISTS `akamu`.`maintainer` (
     ON UPDATE NO ACTION)
   ENGINE = InnoDB;
 
+-- -----------------------------------------------------
+-- Table `akamu`.`maintainer_subject`
+-- Models the subjects a maintainer has access to.
+-- An optional access level may be provided later, that
+-- further specifies what operations the maintainer can
+-- perform.
+-- -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS `akamu`.`maintainer_subject` (
+  `maintainer` INT UNSIGNED NOT NULL,
+  `subject` INT UNSIGNED NOT NULL,
+  PRIMARY KEY(`maintainer`, `subject`),
+  CONSTRAINT `fk_maintainer_subject_maintainer`
+  FOREIGN KEY (`maintainer`)
+  REFERENCES `akamu`.`maintainer` (`idmaintainer`)
+    ON DELETE NO ACTION
+    ON UPDATE NO ACTION,
+  CONSTRAINT `fk_maintainer_subject_subject`
+  FOREIGN KEY (`subject`)
+  REFERENCES `akamu`.`subject` (`idsubject`)
+    ON DELETE NO ACTION
+    ON UPDATE NO ACTION)
+  ENGINE = InnoDB;
 
 -- -----------------------------------------------------
 -- Table `akamu`.`image`
@@ -637,8 +653,8 @@ CREATE TABLE IF NOT EXISTS `akamu`.`trainingsubscription` (
     REFERENCES `akamu`.`useranswer` (`iduseranswer`)
       ON DELETE NO ACTION
       ON UPDATE NO ACTION,
-    CONSTRAINT 'fk_optionuseranswer_option' FOREIGN KEY
-      ('selected')
+    CONSTRAINT `fk_optionuseranswer_option` FOREIGN KEY
+      (`selected`)
     REFERENCES `akamu`.`option` (`idoption`)
       ON DELETE NO ACTION
       ON UPDATE NO ACTION