diff --git a/package.json b/package.json
index d7717ac..a5e8d90 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wetland",
-  "version": "0.6.2",
+  "version": "0.7.0",
   "description": "An enterprise grade ORM for Node.js.",
   "main": "./build/src/index.js",
   "typings": "./build/src/index.d.ts",
diff --git a/src/Mapping.ts b/src/Mapping.ts
index fd22741..4e85074 100644
--- a/src/Mapping.ts
+++ b/src/Mapping.ts
@@ -33,16 +33,6 @@ export class Mapping<T> {
    */
   public static CASCADE_PERSIST = 'persist';
 
-  /**
-   * @type {string}
-   */
-  public static CASCADE_UPDATE = 'update';
-
-  /**
-   * @type {string}
-   */
-  public static CASCADE_DELETE = 'delete';
-
   /**
    * The mapping data.
    *
@@ -234,7 +224,7 @@ export class Mapping<T> {
       indexName = `idx_${(fields as Array<string>).join('_').toLowerCase()}}`;
     }
 
-    let indexes  = this.mapping.fetchOrPut(`indexes.${indexName}`, new ArrayCollection);
+    let indexes = this.mapping.fetchOrPut(`indexes.${indexName}`, new ArrayCollection);
 
     indexes.add(...(Array.isArray(fields) ? fields : [fields]) as Array<string>);
 
@@ -554,7 +544,14 @@ export class Mapping<T> {
    * @returns {Mapping}
    */
   public joinColumn(property: string, options: JoinColumn): this {
-    this.extendField(property, {joinColumn: options});
+    this.extendField(property, {
+      joinColumn: Homefront.merge({
+        name                : `${property}_id`,
+        referencedColumnName: 'id',
+        unique              : false,
+        nullable            : true
+      }, options)
+    });
 
     return this;
   }
@@ -589,36 +586,33 @@ export class Mapping<T> {
    *
    * @returns {JoinTable}
    */
-  public getJoinTable(property: string, entityManager?: EntityManager| Scope): JoinTable {
-    let field = this.mapping.fetchOrPut(`fields.${property}`, {});
+  public getJoinTable(property: string, entityManager: EntityManager| Scope): JoinTable {
+    let field       = this.mapping.fetchOrPut(`fields.${property}`, {});
+    field.joinTable = field.joinTable || {};
 
-    if (!field.joinTable) {
-      if (!entityManager) {
-        return null;
-      }
-
-      let relationMapping = Mapping.forEntity(entityManager.resolveEntityReference(field.relationship.targetEntity));
-      let ownTableName    = this.getTableName();
-      let withTableName   = relationMapping.getTableName();
-      let ownPrimary      = this.getPrimaryKeyField();
-      let withPrimary     = relationMapping.getPrimaryKeyField();
-
-      field.joinTable = {
-        name              : `${ownTableName}_${withTableName}`,
-        joinColumns       : [{
-          referencedColumnName: ownPrimary,
-          name                : `${ownTableName}_id`,
-          type                : 'integer'
-        }],
-        inverseJoinColumns: [{
-          referencedColumnName: withPrimary,
-          name                : `${withTableName}_id`,
-          type                : 'integer'
-        }]
-      };
+    if (!entityManager) {
+      throw new Error('EntityManager is required as a second argument for getJoinTable.');
     }
 
-    return field.joinTable;
+    let relationMapping = Mapping.forEntity(entityManager.resolveEntityReference(field.relationship.targetEntity));
+    let ownTableName    = this.getTableName();
+    let withTableName   = relationMapping.getTableName();
+    let ownPrimary      = this.getPrimaryKeyField();
+    let withPrimary     = relationMapping.getPrimaryKeyField();
+
+    return Homefront.merge({
+      name              : `${ownTableName}_${withTableName}`,
+      joinColumns       : [{
+        referencedColumnName: ownPrimary,
+        name                : `${ownTableName}_id`,
+        type                : 'integer'
+      }],
+      inverseJoinColumns: [{
+        referencedColumnName: withPrimary,
+        name                : `${withTableName}_id`,
+        type                : 'integer'
+      }]
+    }, field.joinTable) as JoinTable;
   }
 
   /**
@@ -870,11 +864,13 @@ export interface JoinTable {
 }
 
 export interface JoinColumn {
-  referencedColumnName: string,
-  name: string,
+  referencedColumnName?: string,
+  name?: string,
   type?: string,
   size?: number,
   indexName?: string,
+  onDelete?: string,
+  onUpdate?: string,
   unique?: boolean,
   nullable?: boolean
 }
diff --git a/src/SchemaBuilder.ts b/src/SchemaBuilder.ts
index 9d1583a..1d02bcc 100644
--- a/src/SchemaBuilder.ts
+++ b/src/SchemaBuilder.ts
@@ -1,4 +1,4 @@
-import {Mapping, FieldOptions, Raw} from './Mapping';
+import {Mapping, FieldOptions, Raw, JoinColumn} from './Mapping';
 import {EntityInterface, EntityCtor} from './EntityInterface';
 import * as Knex from 'knex';
 import {Scope} from './Scope';
@@ -149,16 +149,22 @@ export class SchemaBuilder {
       this.composeFields(table, relations.joinColumns);
 
       relations.foreignKeys.forEach(foreignKey => {
-        let foreign = table.foreign(foreignKey.foreign).references(foreignKey.references).inTable(foreignKey.inTable);
+        let column = foreignKey.joinColumn;
+        let foreign = table.foreign(column.name).references(column.referencedColumnName).inTable(foreignKey.inTable);
 
-        this.applyCascades(mapping.getField(foreignKey.owning).cascades, foreign);
+        if (column.onDelete) {
+          foreign.onDelete(column.onDelete);
+        }
+
+        if (column.onUpdate) {
+          foreign.onDelete(column.onUpdate);
+        }
       });
     });
 
     this.addBuilder(entity, tableName, table => {
       this.composeIndexes(table, mapping);
     }, true);
-
   }
 
   /**
@@ -226,12 +232,7 @@ export class SchemaBuilder {
           nullable: true
         };
 
-        return foreignKeys.push({
-          owning    : property,
-          foreign   : column.name,
-          references: column.referencedColumnName,
-          inTable   : targetMapping.getTableName()
-        });
+        return foreignKeys.push({joinColumn: column, owning: property, inTable: targetMapping.getTableName()});
       }
 
       // Nothing to do for other side.
@@ -301,30 +302,6 @@ export class SchemaBuilder {
     return {joinColumns, foreignKeys};
   }
 
-  /**
-   * Apply cascades to provided table builder.
-   *
-   * @param {string[]}           cascades
-   * @param {Knex.ColumnBuilder} foreign
-   */
-  private applyCascades(cascades: Array<string>, foreign: Knex.ColumnBuilder) {
-    if (!cascades) {
-      return;
-    }
-
-    cascades.forEach(cascade => {
-      if (cascade === Mapping.CASCADE_PERSIST) {
-        return;
-      }
-
-      if (cascade === Mapping.CASCADE_UPDATE) {
-        foreign.onUpdate('cascade');
-      } else if (cascade === Mapping.CASCADE_DELETE) {
-        foreign.onDelete('cascade');
-      }
-    });
-  }
-
   /**
    * Compose the indexes for mapping.
    *
@@ -396,7 +373,7 @@ export class SchemaBuilder {
       column.primary();
     }
 
-    if (field.defaultTo) {
+    if (typeof field.defaultTo !== 'undefined') {
       if (field.defaultTo instanceof Raw) {
         column.defaultTo(<any>this.client.raw(field.defaultTo.getQuery()));
       } else {
@@ -612,5 +589,5 @@ export class SchemaBuilder {
 
 export interface ProcessedRelations {
   joinColumns: {[key: string]: FieldOptions},
-  foreignKeys: Array<{owning: string, foreign: string, references: string, inTable: string}>
+  foreignKeys: Array<{joinColumn: JoinColumn, owning: string, inTable: string}>
 }
diff --git a/test/resource/entity/postal/Delivery.ts b/test/resource/entity/postal/Delivery.ts
index 4cd227b..75f6772 100644
--- a/test/resource/entity/postal/Delivery.ts
+++ b/test/resource/entity/postal/Delivery.ts
@@ -10,6 +10,8 @@ export class Delivery {
 
     mapping.manyToOne('address', {targetEntity: Address, inversedBy: 'deliveries'});
 
-    mapping.forProperty('order').oneToOne({targetEntity: Order}).cascade(['delete']);
+    mapping.forProperty('order')
+      .joinColumn({onDelete: 'cascade'})
+      .oneToOne({targetEntity: Order});
   }
 }