Also remove VisitRepository

Rely on Hibernate to do lazy loading on visits.

src/main/java/org/springframework/samples/petclinic/owner/OwnerController.java

@@ -23,7 +23,6 @@ import javax.validation.Valid;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
-import org.springframework.samples.petclinic.visit.VisitRepository;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.validation.BindingResult;
@@ -48,11 +47,8 @@ class OwnerController {
 
 	private final OwnerRepository owners;
 
-	private final VisitRepository visits;
-
-	public OwnerController(OwnerRepository clinicService, VisitRepository visits) {
+	public OwnerController(OwnerRepository clinicService) {
 		this.owners = clinicService;
-		this.visits = visits;
 	}
 
 	@InitBinder
@@ -161,7 +157,7 @@ class OwnerController {
 		ModelAndView mav = new ModelAndView("owners/ownerDetails");
 		Owner owner = this.owners.findById(ownerId);
 		for (Pet pet : owner.getPets()) {
-			pet.setVisitsInternal(visits.findByPetId(pet.getId()));
+			pet.getVisits();
 		}
 		mav.addObject(owner);
 		return mav;

src/main/java/org/springframework/samples/petclinic/owner/Pet.java

@@ -16,23 +16,20 @@
 package org.springframework.samples.petclinic.owner;
 
 import java.time.LocalDate;
-import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
-import java.util.HashSet;
 import java.util.LinkedHashSet;
-import java.util.List;
 import java.util.Set;
 
+import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
+import javax.persistence.FetchType;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
 import javax.persistence.Table;
-import javax.persistence.Transient;
 
-import org.springframework.beans.support.MutableSortDefinition;
-import org.springframework.beans.support.PropertyComparator;
 import org.springframework.format.annotation.DateTimeFormat;
 import org.springframework.samples.petclinic.model.NamedEntity;
 import org.springframework.samples.petclinic.visit.Visit;
@@ -59,7 +56,8 @@ public class Pet extends NamedEntity {
 	@Column
 	private Integer ownerId;
 
-	@Transient
+	@OneToMany(cascade = CascadeType.ALL, mappedBy = "petId", fetch = FetchType.LAZY)
+	@OrderBy("visit_date ASC")
 	private Set<Visit> visits = new LinkedHashSet<>();
 
 	public void setOwnerId(Integer ownerId) {
@@ -82,25 +80,12 @@ public class Pet extends NamedEntity {
 		this.type = type;
 	}
 
-	protected Set<Visit> getVisitsInternal() {
-		if (this.visits == null) {
-			this.visits = new HashSet<>();
-		}
+	public Collection<Visit> getVisits() {
 		return this.visits;
 	}
 
-	protected void setVisitsInternal(Collection<Visit> visits) {
-		this.visits = new LinkedHashSet<>(visits);
-	}
-
-	public List<Visit> getVisits() {
-		List<Visit> sortedVisits = new ArrayList<>(getVisitsInternal());
-		PropertyComparator.sort(sortedVisits, new MutableSortDefinition("date", false, false));
-		return Collections.unmodifiableList(sortedVisits);
-	}
-
 	public void addVisit(Visit visit) {
-		getVisitsInternal().add(visit);
+		getVisits().add(visit);
 		visit.setPetId(this.getId());
 	}
 

src/main/java/org/springframework/samples/petclinic/owner/Visit.java

@@ -40,10 +40,10 @@ public class Visit extends BaseEntity {
 	private LocalDate date;
 
 	@NotEmpty
-	@Column(name = "description")
+	@Column
 	private String description;
 
-	@Column(name = "pet_id")
+	@Column
 	private Integer petId;
 
 	/**

src/main/java/org/springframework/samples/petclinic/owner/VisitController.java

@@ -15,15 +15,19 @@
  */
 package org.springframework.samples.petclinic.owner;
 
+import java.util.Map;
+
+import javax.validation.Valid;
+
 import org.springframework.samples.petclinic.visit.Visit;
-import org.springframework.samples.petclinic.visit.VisitRepository;
 import org.springframework.stereotype.Controller;
 import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.WebDataBinder;
-import org.springframework.web.bind.annotation.*;
-
-import javax.validation.Valid;
-import java.util.Map;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.InitBinder;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
 
 /**
  * @author Juergen Hoeller
@@ -35,12 +39,9 @@ import java.util.Map;
 @Controller
 class VisitController {
 
-	private final VisitRepository visits;
-
 	private final OwnerRepository owners;
 
-	public VisitController(VisitRepository visits, OwnerRepository owners) {
-		this.visits = visits;
+	public VisitController(OwnerRepository owners) {
 		this.owners = owners;
 	}
 
@@ -61,7 +62,6 @@ class VisitController {
 			Map<String, Object> model) {
 		Owner owner = this.owners.findById(ownerId);
 		Pet pet = owner.getPet(petId);
-		pet.setVisitsInternal(this.visits.findByPetId(petId));
 		model.put("pet", pet);
 		Visit visit = new Visit();
 		pet.addVisit(visit);
@@ -78,12 +78,14 @@ class VisitController {
 	// Spring MVC calls method loadPetWithVisit(...) before processNewVisitForm is
 	// called
 	@PostMapping("/owners/{ownerId}/pets/{petId}/visits/new")
-	public String processNewVisitForm(@Valid Visit visit, BindingResult result) {
+	public String processNewVisitForm(@PathVariable("ownerId") int ownerId, @Valid Visit visit, BindingResult result) {
 		if (result.hasErrors()) {
 			return "pets/createOrUpdateVisitForm";
 		}
 		else {
-			this.visits.save(visit);
+			Owner owner = this.owners.findById(ownerId);
+			owner.getPet(visit.getPetId()).addVisit(visit);
+			this.owners.save(owner);
 			return "redirect:/owners/{ownerId}";
 		}
 	}

src/main/java/org/springframework/samples/petclinic/visit/VisitRepository.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 2012-2019 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.samples.petclinic.visit;
-
-import org.springframework.dao.DataAccessException;
-import org.springframework.data.repository.Repository;
-import org.springframework.samples.petclinic.model.BaseEntity;
-
-import java.util.List;
-
-/**
- * Repository class for <code>Visit</code> domain objects All method names are compliant
- * with Spring Data naming conventions so this interface can easily be extended for Spring
- * Data. See:
- * https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.query-methods.query-creation
- *
- * @author Ken Krebs
- * @author Juergen Hoeller
- * @author Sam Brannen
- * @author Michael Isvy
- */
-public interface VisitRepository extends Repository<Visit, Integer> {
-
-	/**
-	 * Save a <code>Visit</code> to the data store, either inserting or updating it.
-	 * @param visit the <code>Visit</code> to save
-	 * @see BaseEntity#isNew
-	 */
-	void save(Visit visit) throws DataAccessException;
-
-	List<Visit> findByPetId(Integer petId);
-
-}

src/test/java/org/springframework/samples/petclinic/owner/OwnerControllerTests.java

@@ -47,7 +47,6 @@ import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.Pageable;
 import org.springframework.samples.petclinic.visit.Visit;
-import org.springframework.samples.petclinic.visit.VisitRepository;
 import org.springframework.test.web.servlet.MockMvc;
 
 /**
@@ -66,9 +65,6 @@ class OwnerControllerTests {
 	@MockBean
 	private OwnerRepository owners;
 
-	@MockBean
-	private VisitRepository visits;
-
 	private Owner george() {
 		Owner george = new Owner();
 		george.setId(TEST_OWNER_ID);
@@ -91,15 +87,17 @@ class OwnerControllerTests {
 	@BeforeEach
 	void setup() {
 
+		Owner george = george();
 		given(this.owners.findByLastName(eq("Franklin"), any(Pageable.class)))
-				.willReturn(new PageImpl<Owner>(Lists.newArrayList(george())));
+				.willReturn(new PageImpl<Owner>(Lists.newArrayList(george)));
 
-		given(this.owners.findAll(any(Pageable.class))).willReturn(new PageImpl<Owner>(Lists.newArrayList(george())));
+		given(this.owners.findAll(any(Pageable.class))).willReturn(new PageImpl<Owner>(Lists.newArrayList(george)));
 
-		given(this.owners.findById(TEST_OWNER_ID)).willReturn(george());
+		given(this.owners.findById(TEST_OWNER_ID)).willReturn(george);
 		Visit visit = new Visit();
 		visit.setDate(LocalDate.now());
-		given(this.visits.findByPetId(george().getPet("Max").getId())).willReturn(Collections.singletonList(visit));
+		visit.setPetId(george.getPet("Max").getId());
+		george.getPet("Max").getVisits().add(visit);
 
 	}
 

src/test/java/org/springframework/samples/petclinic/owner/VisitControllerTests.java

@@ -16,19 +16,20 @@
 
 package org.springframework.samples.petclinic.owner;
 
+import static org.mockito.BDDMockito.given;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.model;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
 import org.springframework.boot.test.mock.mockito.MockBean;
-import org.springframework.samples.petclinic.visit.VisitRepository;
 import org.springframework.test.web.servlet.MockMvc;
 
-import static org.mockito.BDDMockito.given;
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
-
 /**
  * Test class for {@link VisitController}
  *
@@ -44,9 +45,6 @@ class VisitControllerTests {
 	@Autowired
 	private MockMvc mockMvc;
 
-	@MockBean
-	private VisitRepository visits;
-
 	@MockBean
 	private OwnerRepository owners;
 

src/test/java/org/springframework/samples/petclinic/service/ClinicServiceTests.java

@@ -36,7 +36,6 @@ import org.springframework.samples.petclinic.owner.PetType;
 import org.springframework.samples.petclinic.vet.Vet;
 import org.springframework.samples.petclinic.vet.VetRepository;
 import org.springframework.samples.petclinic.visit.Visit;
-import org.springframework.samples.petclinic.visit.VisitRepository;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -76,9 +75,6 @@ class ClinicServiceTests {
 	@Autowired
 	protected OwnerRepository owners;
 
-	@Autowired
-	protected VisitRepository visits;
-
 	@Autowired
 	protected VetRepository vets;
 
@@ -205,17 +201,18 @@ class ClinicServiceTests {
 		Visit visit = new Visit();
 		pet7.addVisit(visit);
 		visit.setDescription("test");
-		this.visits.save(visit);
 		this.owners.save(owner6);
 
 		owner6 = this.owners.findById(6);
 		assertThat(pet7.getVisits().size()).isEqualTo(found + 1);
-		assertThat(visit.getId()).isNotNull();
+		assertThat(pet7.getVisits()).allMatch(value -> value.getId() != null);
 	}
 
 	@Test
 	void shouldFindVisitsByPetId() throws Exception {
-		Collection<Visit> visits = this.visits.findByPetId(7);
+		Owner owner6 = this.owners.findById(6);
+		Pet pet7 = owner6.getPet(7);
+		Collection<Visit> visits = pet7.getVisits();
 		assertThat(visits).hasSize(2);
 		Visit[] visitArr = visits.toArray(new Visit[visits.size()]);
 		assertThat(visitArr[0].getDate()).isNotNull();