Q: Ebean @ManyToMany(cascade=REMOVE) described #429

src/test/java/com/avaje/tests/m2m/TestM2MDeleteCascadeFromParent.java

@@ -0,0 +1,52 @@
+package com.avaje.tests.m2m;
+
+import com.avaje.ebean.BaseTestCase;
+import com.avaje.ebean.Ebean;
+import com.avaje.ebean.SqlQuery;
+import com.avaje.ebean.SqlRow;
+import com.avaje.tests.model.basic.MnocRole;
+import com.avaje.tests.model.basic.MnocUser;
+import com.avaje.tests.model.m2m.MnyA;
+import com.avaje.tests.model.m2m.MnyB;
+import com.avaje.tests.model.m2m.MnyC;
+import org.junit.Assert;
+import org.junit.Test;
+
+import javax.persistence.PersistenceException;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class TestM2MDeleteCascadeFromParent extends BaseTestCase {
+
+  @Test
+  public void test() {
+
+    MnyC c0 = new MnyC();
+    c0.setName("c0");
+    c0.save();
+
+    MnyA a0 = new MnyA();
+    a0.setName("a0");
+    a0.save();
+
+    MnyB b0 = new MnyB();
+    b0.setName("b0");
+    b0.setA(a0);
+    b0.save();
+
+    c0.getBs().add(b0);
+    Ebean.saveAssociation(c0, "bs");
+
+    SqlQuery sqlQuery = Ebean.createSqlQuery("select count(*) as count from mny_b_mny_c");
+    SqlRow unique = sqlQuery.findUnique();
+    assertEquals(Long.valueOf(1), unique.getLong("count"));
+
+
+    //Ebean.deleteManyToManyAssociations(b0, "cs");
+    a0.delete();
+
+  }
+
+
+}

src/test/java/com/avaje/tests/model/m2m/MnyA.java

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+package com.avaje.tests.model.m2m;
+
+import com.avaje.tests.model.BaseModel;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.OneToMany;
+import java.util.List;
+
+@Entity
+public class MnyA extends BaseModel {
+
+  String name;
+
+  @OneToMany(mappedBy = "a", cascade = CascadeType.REMOVE)
+  List<MnyB> bs;
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public List<MnyB> getBs() {
+    return bs;
+  }
+
+  public void setBs(List<MnyB> bs) {
+    this.bs = bs;
+  }
+}
+

src/test/java/com/avaje/tests/model/m2m/MnyB.java

@@ -0,0 +1,45 @@
+package com.avaje.tests.model.m2m;
+
+import com.avaje.tests.model.BaseModel;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.ManyToMany;
+import javax.persistence.ManyToOne;
+import java.util.List;
+
+@Entity
+public class MnyB extends BaseModel {
+
+  String name;
+
+  @ManyToOne
+  MnyA a;
+
+  @ManyToMany(cascade = CascadeType.REMOVE)
+  List<MnyC> cs;
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public MnyA getA() {
+    return a;
+  }
+
+  public void setA(MnyA a) {
+    this.a = a;
+  }
+
+  public List<MnyC> getCs() {
+    return cs;
+  }
+
+  public void setCs(List<MnyC> cs) {
+    this.cs = cs;
+  }
+}

src/test/java/com/avaje/tests/model/m2m/MnyC.java

@@ -0,0 +1,32 @@
+package com.avaje.tests.model.m2m;
+
+import com.avaje.tests.model.BaseModel;
+
+import javax.persistence.Entity;
+import javax.persistence.ManyToMany;
+import java.util.List;
+
+@Entity
+public class MnyC extends BaseModel {
+
+  String name;
+
+  @ManyToMany(mappedBy = "cs")
+  List<MnyB> bs;
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public List<MnyB> getBs() {
+    return bs;
+  }
+
+  public void setBs(List<MnyB> bs) {
+    this.bs = bs;
+  }
+}