diff --git a/gui/newrecipedialog.cpp b/gui/newrecipedialog.cpp
index 5e35cee..f35b50d 100644
--- a/gui/newrecipedialog.cpp
+++ b/gui/newrecipedialog.cpp
@@ -195,6 +195,7 @@ void NewRecipeDialog::on_newUnitButton_clicked(){
 			QMessageBox::critical(this, "Error", "Unable to store new unit.");
 		} else {
 			this->populateUnitsBox();
+			ui->unitComboBox->setCurrentText(QString::fromStdString(u.getName()));
 		}
 	}
 }
diff --git a/main.cpp b/main.cpp
index 688b57e..462f772 100644
--- a/main.cpp
+++ b/main.cpp
@@ -6,6 +6,8 @@
 #include "model/database/recipedatabase.h"
 #include "utils/fileutils.h"
 
+void test(RecipeDatabase *recipeDB);
+
 int main(int argc, char *argv[])
 {
 	RecipeDatabase recipeDB(QString(FileUtils::appDataPath+"recipes.db").toStdString());
@@ -14,6 +16,18 @@ int main(int argc, char *argv[])
     w.show();
 
 	//TESTING CODE
+	test(&recipeDB);
+
+	//END TESTING CODE.
+
+	w.loadFromRecipe(recipeDB.retrieveRandomRecipe());
+
+	a.exec();
+	recipeDB.closeConnection();
+	return 0;
+}
+
+void test(RecipeDatabase *recipeDB){
 	vector<RecipeIngredient> ri;
 	ri.push_back(RecipeIngredient("flour", "grains", 3.0f, UnitOfMeasure("cup", "cups", "c", UnitOfMeasure::VOLUME, 1.0), ""));
 	ri.push_back(RecipeIngredient("baking powder", "additives", 1.0f, UnitOfMeasure("teaspoon", "teaspoons", "tsp", UnitOfMeasure::VOLUME, 1.0), ""));
@@ -29,12 +43,21 @@ int main(int argc, char *argv[])
 			   QTime(0, 25),
 			   10.0f);
 
-	bool success = recipeDB.storeRecipe(rec);
+	bool success = recipeDB->storeRecipe(rec);
 	printf("Storage successful: %d\n", success);
 
-	w.loadFromRecipe(recipeDB.retrieveRandomRecipe());
+	vector<string> foodGroups = recipeDB->retrieveAllFoodGroups();
+	printf("Food Groups:\n");
+	for (string s : foodGroups){
+		printf("\t%s\n", s.c_str());
+	}
+
+	//Get food groups from recipe.
+	Recipe r = recipeDB->retrieveRecipe("Pannenkoeken");
+	vector<string> foodGroupsR = r.getFoodGroups();
+	printf("Pannenkoeken Food Groups:\n");
+	for (string s : foodGroupsR){
+		printf("\t%s\n", s.c_str());
+	}
 
-	a.exec();
-	recipeDB.closeConnection();
-	return 0;
 }
diff --git a/model/database/recipedatabase.cpp b/model/database/recipedatabase.cpp
index 412db80..24e5151 100644
--- a/model/database/recipedatabase.cpp
+++ b/model/database/recipedatabase.cpp
@@ -88,7 +88,7 @@ int RecipeDatabase::storeIngredient(Ingredient ingredient){
 			return -1;
 		}
 	} else {
-		return std::stoi(t.valueAt(0, 0));
+		return std::stoi(t.at(0, 0));
 	}
 }
 
@@ -162,12 +162,21 @@ Recipe RecipeDatabase::retrieveRandomRecipe(){
 vector<Recipe> RecipeDatabase::retrieveAllRecipes(){
 	ResultTable t = this->selectFrom("recipe", "name", "ORDER BY name");
 	vector<Recipe> recipes;
-	for (unsigned int row = 0; row < t.rowCount(); row++){
-		recipes.push_back(this->retrieveRecipe(t.valueAt(row, 0)));
+	for (TableRow row : t.rows()){
+		recipes.push_back(this->retrieveRecipe(row.at(0)));
 	}
 	return recipes;
 }
 
+vector<string> RecipeDatabase::retrieveAllFoodGroups(){
+	ResultTable t = this->executeSQL("SELECT DISTINCT foodGroup FROM ingredient ORDER BY foodGroup;");
+	vector<string> foodGroups;
+	for (TableRow row : t.rows()){
+		foodGroups.push_back(row.at(0));
+	}
+	return foodGroups;
+}
+
 vector<RecipeIngredient> RecipeDatabase::retrieveRecipeIngredients(int recipeId){
 	ResultTable t = this->executeSQL("SELECT ingredient.name, ingredient.foodGroup, "//0, 1
 									 "recipeIngredient.quantity, recipeIngredient.unitName, recipeIngredient.comment,"//2, 3, 4
@@ -179,33 +188,33 @@ vector<RecipeIngredient> RecipeDatabase::retrieveRecipeIngredients(int recipeId)
 									 "ON recipeIngredient.unitName = unitOfMeasure.name "
 									 "WHERE recipeIngredient.recipeId = "+std::to_string(recipeId)+";");
 	vector<RecipeIngredient> ings;
-	for (unsigned int row = 0; row < t.rowCount(); row++){
-		RecipeIngredient r(t.valueAt(row, 0),
-						   t.valueAt(row, 1),
-						   std::stof(t.valueAt(row, 2)),
-						   UnitOfMeasure(t.valueAt(row, 5), t.valueAt(row, 6), t.valueAt(row, 7), std::stoi(t.valueAt(row, 8)), std::stod(t.valueAt(row, 9))),
-						   t.valueAt(row, 4));
+	for (TableRow row : t.rows()){
+		RecipeIngredient r(row.at(0),
+						   row.at(1),
+						   std::stof(row.at(2)),
+						   UnitOfMeasure(row.at(5), row.at(6), row.at(7), std::stoi(row.at(8)), std::stod(row.at(9))),
+						   row.at(4));
 		ings.push_back(r);
 	}
 	return ings;
 }
 
 vector<Ingredient> RecipeDatabase::retrieveAllIngredients(){
-	ResultTable t = this->selectFrom("ingredient", "*", "ORDER BY name");
+	ResultTable t = this->selectFrom("ingredient", "name, foodGroup", "ORDER BY name");
 	vector<Ingredient> ings;
-	for (unsigned int row = 0; row < t.rowCount(); row++){
-		Ingredient i(t.valueAt(row, 2), t.valueAt(row, 1));
+	for (TableRow row : t.rows()){
+		Ingredient i(row.at(0), row.at(1));
 		ings.push_back(i);
 	}
 	return ings;
 }
 
 vector<UnitOfMeasure> RecipeDatabase::retrieveAllUnitsOfMeasure(){
-	ResultTable t = this->selectFrom("unitOfMeasure", "*", "ORDER BY name");
+	ResultTable t = this->selectFrom("unitOfMeasure", "name, plural, abbreviation, type, metricCoefficient", "ORDER BY name");
 	vector<UnitOfMeasure> units;
 	if (!t.isEmpty()){
-		for (unsigned int row = 0; row < t.rowCount(); row++){
-			UnitOfMeasure u(t.valueAt(row, 0), t.valueAt(row, 1), t.valueAt(row, 2), std::stoi(t.valueAt(row, 3)), std::stod(t.valueAt(row, 4)));
+		for (TableRow row : t.rows()){
+			UnitOfMeasure u(row.at(0), row.at(1), row.at(2), std::stoi(row.at(3)), std::stod(row.at(4)));
 			units.push_back(u);
 		}
 	}
@@ -213,11 +222,11 @@ vector<UnitOfMeasure> RecipeDatabase::retrieveAllUnitsOfMeasure(){
 }
 
 vector<RecipeTag> RecipeDatabase::retrieveTags(int recipeId){
-	ResultTable t = this->selectFrom("recipeTag", "tagName", "WHERE recipeId="+std::to_string(recipeId));
+	ResultTable t = this->selectFrom("recipeTag", "tagName", "WHERE recipeId="+std::to_string(recipeId)+" ORDER BY tagName");
 	vector<RecipeTag> tags;
 	if (!t.isEmpty()){
-		for (unsigned int row = 0; row < t.rowCount(); row++){
-			RecipeTag tag(t.valueAt(row, 0));
+		for (TableRow row : t.rows()){
+			RecipeTag tag(row.at(0));
 			tags.push_back(tag);
 		}
 	}
@@ -228,8 +237,8 @@ vector<RecipeTag> RecipeDatabase::retrieveAllTags(){
 	ResultTable t = this->selectFrom("recipeTag", "tagName", "ORDER BY tagName");
 	vector<RecipeTag> tags;
 	if (!t.isEmpty()){
-		for (unsigned int row = 0; row < t.rowCount(); row++){
-			RecipeTag tag(t.valueAt(row, 0));
+		for (TableRow row : t.rows()){
+			RecipeTag tag(row.at(0));
 			tags.push_back(tag);
 		}
 	}
@@ -241,7 +250,7 @@ bool RecipeDatabase::deleteRecipe(string name){
 	if (t.rowCount() != 1){
 		return false;
 	}
-	string recipeId = t.valueAt(0, 0);
+	string recipeId = t.at(0, 0);
 	return this->deleteRecipe(std::stoi(recipeId));
 }
 
@@ -257,6 +266,8 @@ bool RecipeDatabase::deleteRecipe(int recipeId){
 	bool recipeDeleted = this->deleteFrom("recipe", "WHERE recipeId="+idString);
 	bool instructionDeleted = FileUtils::deleteInstruction(recipeId);
 	bool imageDeleted = FileUtils::deleteImage(recipeId);
+	Q_UNUSED(instructionDeleted);
+	Q_UNUSED(imageDeleted);
 	if (tagsDeleted && recipeIngredientDeleted && recipeDeleted){
 		this->executeSQL("COMMIT;");
 		return true;
@@ -334,14 +345,15 @@ void RecipeDatabase::ensureTablesExist(){
 	this->executeSQL("COMMIT;");
 }
 
-Recipe RecipeDatabase::readFromResultTable(ResultTable t, int row){
+Recipe RecipeDatabase::readFromResultTable(ResultTable t, int tRow){
 	Recipe r;
-	int id = std::stoi(t.valueAt(row, 0));
-	r.setName(t.valueAt(row, 1));
-	r.setCreatedDate(QDate::fromString(QString::fromStdString(t.valueAt(row, 2))));
-	r.setPrepTime(QTime::fromString(QString::fromStdString(t.valueAt(row, 3))));
-	r.setCookTime(QTime::fromString(QString::fromStdString(t.valueAt(row, 4))));
-	r.setServings(std::stof(t.valueAt(row, 5)));
+	TableRow row = t.rows().at(tRow);
+	int id = std::stoi(row.at(0));
+	r.setName(row.at(1));
+	r.setCreatedDate(QDate::fromString(QString::fromStdString(row.at(2))));
+	r.setPrepTime(QTime::fromString(QString::fromStdString(row.at(3))));
+	r.setCookTime(QTime::fromString(QString::fromStdString(row.at(4))));
+	r.setServings(std::stof(row.at(5)));
 	r.setInstruction(FileUtils::loadInstruction(id));
 	r.setImage(FileUtils::loadImage(id));
 	r.setIngredients(this->retrieveRecipeIngredients(id));
diff --git a/model/database/recipedatabase.h b/model/database/recipedatabase.h
index c5466b7..e02c60a 100644
--- a/model/database/recipedatabase.h
+++ b/model/database/recipedatabase.h
@@ -34,6 +34,7 @@ class RecipeDatabase : public Database
 		Recipe retrieveRecipe(string name);
 		Recipe retrieveRandomRecipe();
 		vector<Recipe> retrieveAllRecipes();
+		vector<string> retrieveAllFoodGroups();
 		vector<RecipeIngredient> retrieveRecipeIngredients(int recipeId);
 		vector<Ingredient> retrieveAllIngredients();
 		vector<UnitOfMeasure> retrieveAllUnitsOfMeasure();
diff --git a/model/database/resulttable.cpp b/model/database/resulttable.cpp
index 9811d64..ac96d7b 100644
--- a/model/database/resulttable.cpp
+++ b/model/database/resulttable.cpp
@@ -47,7 +47,7 @@ bool ResultTable::isEmpty(){
 	return this->values.empty();
 }
 
-string ResultTable::valueAt(unsigned int row, unsigned int col){
+string ResultTable::at(unsigned int row, unsigned int col){
 	if (isIndexValid(row, col)){
 		return this->values[row][col];
 	} else {
@@ -78,6 +78,10 @@ unsigned int ResultTable::rowCount(){
 	return this->values.size();
 }
 
+vector<vector<string> > ResultTable::rows(){
+	return this->values;
+}
+
 string ResultTable::convertToString(sqlite3_value *val){
 	const unsigned char* raw_text = sqlite3_value_text(val);
 	if (raw_text == 0){
diff --git a/model/database/resulttable.h b/model/database/resulttable.h
index a138ea3..a4dcd84 100644
--- a/model/database/resulttable.h
+++ b/model/database/resulttable.h
@@ -12,6 +12,8 @@ using namespace std;
  * @brief The ResultTable class is an object that contains the results of an SQL query, in string form.
  */
 
+typedef vector<string> TableRow;
+
 class ResultTable
 {
 	public:
@@ -28,11 +30,12 @@ class ResultTable
 		void printData();
 
 		bool isEmpty();
-		string valueAt(unsigned int row, unsigned int col);
+		string at(unsigned int row, unsigned int col);
 		int getReturnCode();
 		string getOriginalQuery();
 		unsigned int columnCount();
 		unsigned int rowCount();
+		vector<vector<string>> rows();
 	private:
 		vector<vector<string>> values;
 		int queryCode;
diff --git a/model/recipe/recipe.cpp b/model/recipe/recipe.cpp
index 0859bd8..a899c1f 100644
--- a/model/recipe/recipe.cpp
+++ b/model/recipe/recipe.cpp
@@ -21,7 +21,17 @@ string Recipe::getName() const{
 }
 
 vector<RecipeIngredient> Recipe::getIngredients() const{
-    return this->ingredients;
+	return this->ingredients;
+}
+
+vector<string> Recipe::getFoodGroups() const{
+	vector<string> foodGroups;
+	for (RecipeIngredient ri : this->ingredients){
+		if (find(foodGroups.begin(), foodGroups.end(), ri.getFoodGroup()) == foodGroups.end()){
+			foodGroups.push_back(ri.getFoodGroup());
+		}
+	}
+	return foodGroups;
 }
 
 Instruction Recipe::getInstruction() const{
diff --git a/model/recipe/recipe.h b/model/recipe/recipe.h
index 048b09a..3bdb92d 100644
--- a/model/recipe/recipe.h
+++ b/model/recipe/recipe.h
@@ -6,6 +6,7 @@
 #include <QDate>
 #include <QTime>
 #include <QImage>
+#include <algorithm>
 
 #include "model/recipe/ingredients/recipeingredient.h"
 #include "model/recipe/instruction.h"
@@ -38,6 +39,7 @@ public:
     //Getters
     string getName() const;
     vector<RecipeIngredient> getIngredients() const;
+	vector<string> getFoodGroups() const;
     Instruction getInstruction() const;
     QImage getImage() const;
     vector<RecipeTag> getTags() const;
diff --git a/model/recipe/recipetablemodel.cpp b/model/recipe/recipetablemodel.cpp
index 521fa51..aab90e4 100644
--- a/model/recipe/recipetablemodel.cpp
+++ b/model/recipe/recipetablemodel.cpp
@@ -72,8 +72,8 @@ void RecipeTableModel::setRecipes(vector<Recipe> recipes){
 	endInsertRows();
 }
 
-Recipe RecipeTableModel::getRecipeAt(int index){
-	if (index < 0 || index >= this->recipes.size()){
+Recipe RecipeTableModel::getRecipeAt(unsigned int index){
+	if (index >= this->recipes.size()){
 		return Recipe();
 	}
 	return this->recipes[index];
diff --git a/model/recipe/recipetablemodel.h b/model/recipe/recipetablemodel.h
index 7449619..74645d7 100644
--- a/model/recipe/recipetablemodel.h
+++ b/model/recipe/recipetablemodel.h
@@ -20,7 +20,7 @@ class RecipeTableModel : public QAbstractTableModel
 
 		//Normal methods.
 		void setRecipes(vector<Recipe> recipes);
-		Recipe getRecipeAt(int index);
+		Recipe getRecipeAt(unsigned int index);
 		void clear();
 	private:
 		vector<Recipe> recipes;
diff --git a/utils/stringutils.cpp b/utils/stringutils.cpp
index f6115e8..86cafc3 100644
--- a/utils/stringutils.cpp
+++ b/utils/stringutils.cpp
@@ -29,4 +29,13 @@ std::string toString(float val){
 	return s;
 }
 
+void printVector(std::vector<std::string> &vect){
+	std::printf("Vector of %ld elements:\n", vect.size());
+	int c = 0;
+	for (std::string s : vect){
+		std::printf("\t[%d] = %s\n", c, s.c_str());
+		c++;
+	}
+}
+
 }
diff --git a/utils/stringutils.h b/utils/stringutils.h
index c678e46..5646704 100644
--- a/utils/stringutils.h
+++ b/utils/stringutils.h
@@ -2,6 +2,7 @@
 #define STRINGUTILS_H
 
 #include <string>
+#include <vector>
 #include <cmath>
 
 namespace StringUtils{