#696 - ENH: Add fallback for @DbHstore ... fallback to JSON storage in VARCHAR

src/test/java/com/avaje/tests/model/json/EBasicHstore.java

@@ -0,0 +1,62 @@
+package com.avaje.tests.model.json;
+
+import com.avaje.ebean.annotation.DbHstore;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Version;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+@Entity
+public class EBasicHstore {
+
+  @Id
+  Long id;
+
+  String name;
+
+  // fallback to varchar(800) for non-Postgres
+  @DbHstore(length = 800)
+  Map<String,String> map;
+
+  @Version
+  Long version;
+
+  public EBasicHstore(String name) {
+    this.name = name;
+    this.map = new LinkedHashMap<String, String>();
+  }
+
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public Map<String, String> getMap() {
+    return map;
+  }
+
+  public void setMap(Map<String, String> map) {
+    this.map = map;
+  }
+
+  public Long getVersion() {
+    return version;
+  }
+
+  public void setVersion(Long version) {
+    this.version = version;
+  }
+}

src/test/java/com/avaje/tests/types/TestHstore.java

@@ -0,0 +1,83 @@
+package com.avaje.tests.types;
+
+import com.avaje.ebean.BaseTestCase;
+import com.avaje.ebean.Ebean;
+import com.avaje.tests.model.json.EBasicHstore;
+import org.assertj.core.api.Assertions;
+import org.avaje.ebeantest.LoggedSqlCollector;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.StrictAssertions.assertThat;
+import static org.junit.Assert.assertEquals;
+
+public class TestHstore extends BaseTestCase {
+
+  private EBasicHstore bean;
+
+  @Test
+  public void insert() {
+
+    if (isPostgres()) {
+      // run this manually for Postgres with the HSTORE extension installed
+      // psql mydb -c 'create extension hstore;'
+      return;
+    }
+
+    bean = new EBasicHstore("one");
+    bean.getMap().put("home", "123");
+    bean.getMap().put("work", "987");
+
+    Ebean.save(bean);
+
+    json_parse_format();
+    update_when_notDirty();
+    update_when_dirty();
+    insert_when_null();
+  }
+
+  void json_parse_format() {
+
+    String asJson = Ebean.json().toJson(bean);
+    assertThat(asJson).contains("\"map\":{\"home\":\"123\",\"work\":\"987\"}");
+
+    EBasicHstore fromJson = Ebean.json().toBean(EBasicHstore.class, asJson);
+    assertEquals(bean.getId(), fromJson.getId());
+    assertEquals(bean.getName(), fromJson.getName());
+    Assertions.assertThat(fromJson.getMap().keySet()).containsExactly("home", "work");
+  }
+
+  void update_when_notDirty() {
+
+    EBasicHstore found = Ebean.find(EBasicHstore.class, bean.getId());
+    found.setName("modName");
+
+    LoggedSqlCollector.start();
+    Ebean.save(found);
+    List<String> sql = LoggedSqlCollector.stop();
+
+    // we don't update the map as it is not dirty
+    assertThat(sql.get(0)).contains("update ebasic_hstore set name=?, version=? where");
+  }
+
+  void update_when_dirty() {
+
+    EBasicHstore found = Ebean.find(EBasicHstore.class, bean.getId());
+    found.setName("modNamePlus");
+    found.getMap().put("foo","9987");
+
+    LoggedSqlCollector.start();
+    Ebean.save(found);
+    List<String> sql = LoggedSqlCollector.stop();
+
+    assertThat(sql.get(0)).contains("update ebasic_hstore set name=?, map=?, version=? where id=? and version=?");
+  }
+
+  void insert_when_null() {
+
+    EBasicHstore bean = new EBasicHstore("one");
+    bean.setMap(null);
+    Ebean.save(bean);
+  }
+}