fix TQRootBean.exists() when used with .or()

ebean-querybean/src/main/java/io/ebean/typequery/TQRootBean.java

@@ -745,15 +745,15 @@ public R withLock(Query.LockType lockType, Query.LockWait lockWait) {
    * Add EXISTS sub-query predicate.
    */
   public R exists(Query<?> subQuery) {
-    query.where().exists(subQuery);
+    peekExprList().exists(subQuery);
     return root;
   }
 
   /**
    * Add NOT EXISTS sub-query predicate.
    */
   public R notExists(Query<?> subQuery) {
-    query.where().notExists(subQuery);
+    peekExprList().notExists(subQuery);
     return root;
   }
 
@@ -764,7 +764,7 @@ public R notExists(Query<?> subQuery) {
    * @param bindValues  Optional bind values if the SubQuery uses {@code ? } bind values.
    */
   public final R exists(String sqlSubQuery, Object... bindValues) {
-    query().where().exists(sqlSubQuery, bindValues);
+    peekExprList().exists(sqlSubQuery, bindValues);
     return root;
   }
 
@@ -775,7 +775,7 @@ public final R exists(String sqlSubQuery, Object... bindValues) {
    * @param bindValues  Optional bind values if the SubQuery uses {@code ? } bind values.
    */
   public final R notExists(String sqlSubQuery, Object... bindValues) {
-    query().where().notExists(sqlSubQuery, bindValues);
+    peekExprList().notExists(sqlSubQuery, bindValues);
     return root;
   }
 

ebean-querybean/src/test/java/org/example/domain/Contact.java

@@ -1,8 +1,9 @@
 package org.example.domain;
 
 import io.ebean.annotation.DbArray;
-
 import jakarta.persistence.*;
+import org.example.domain.finder.ContactFinder;
+
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Size;
 import java.time.ZonedDateTime;
@@ -17,6 +18,11 @@
 @Table(name = "be_contact")
 public class Contact extends BaseModel {
 
+  /**
+   * Convenience Finder for 'active record' style.
+   */
+  public static final ContactFinder find = new ContactFinder();
+
   @DbArray
   List<@Size(max=20) String> phoneNumbers = new ArrayList<>();
 

ebean-querybean/src/test/java/org/example/domain/finder/ContactFinder.java

@@ -0,0 +1,18 @@
+package org.example.domain.finder;
+
+import io.ebean.Finder;
+import org.example.domain.Contact;
+import org.example.domain.query.QContact;
+
+/**
+ */
+public class ContactFinder extends Finder<Long, Contact> {
+
+  public ContactFinder() {
+    super(Contact.class);
+  }
+
+  public QContact typed() {
+    return new QContact();
+  }
+}

ebean-querybean/src/test/java/org/querytest/QCustomerAndOrTest.java

@@ -1,6 +1,8 @@
 package org.querytest;
 
+import org.example.domain.Contact;
 import org.example.domain.Customer;
+import org.example.domain.query.QCustomer;
 import org.junit.jupiter.api.Test;
 
 import java.time.LocalDate;
@@ -9,6 +11,8 @@
 import java.util.Date;
 import java.util.List;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class QCustomerAndOrTest {
 
   @Test
@@ -55,6 +59,30 @@ public void testQuery() {
 
   }
 
+  @Test
+  public void testOrWithExists() {
+    QCustomer query = Customer.find.typed()
+      .alias("_cust")
+      .or()
+      .name.eq("Superman")
+      .exists(Contact.find.typed()
+        .alias("contact")
+        .firstName.eq("Superman")
+        .raw("contact.customer_id = _cust.id")
+        .query()
+      )
+      .endOr()
+      .select(QCustomer.alias().id);
+
+    query.findList();
+
+    assertThat(query.getGeneratedSql()).isEqualTo(
+      "select _cust.id from be_customer _cust where (" +
+        "_cust.name = ? or exists (select 1 from be_contact contact where " +
+        "contact.first_name = ? and contact.customer_id = _cust.id))"
+    );
+  }
+
   private Date fiveDaysAgo() {
     LocalDateTime fiveDaysAgo = LocalDate.now().atStartOfDay().minusDays(5);
     return new Date(fiveDaysAgo.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());