Modèle composite avec OrmLite pour Android

Question

Je programme une application Android et utilise ormLite pour la base de données.

Je souhaite utiliser le Composite Pattern pour certains éléments de base de données.

j'ai écrit le code suivant:

Foodstuff

package com.android.droidfridge.data; 

import com.j256.ormlite.field.DatabaseField; 

public abstract class Foodstuff 
{ 
    @DatabaseField(id = true, useGetSet = true) 
    private String name; 

    @DatabaseField(useGetSet = true, foreign = true) 
    private Category category; 

    @DatabaseField(useGetSet = true) 
    private int image; 

    public String getName() 
    { 
     return name; 
    } 

    public void setName(String name) 
    { 
     this.name = name; 
    } 

    public Category getCategory() 
    { 
     return category; 
    } 

    public void setCategory(Category category) 
    { 
     this.category = category; 
    } 

    public int getImage() 
    { 
     return image; 
    } 

    public void setImage(int image) 
    { 
     this.image = image; 
    } 
} 

Ingrédients

package com.android.droidfridge.data; 

import java.io.Serializable; 

import com.j256.ormlite.field.DatabaseField; 
import com.j256.ormlite.table.DatabaseTable; 

@DatabaseTable(tableName = "ingredients") 
public class Ingredient extends Foodstuff implements Serializable 
{ 
    private static final long serialVersionUID = 5798705059641377421L; 

    @DatabaseField(useGetSet = true) 
    private int amount; 

    @DatabaseField(useGetSet = true) 
    private int defaultAmount; 

    @DatabaseField(useGetSet = true) 
    private float price; 

    @DatabaseField(useGetSet = true) 
    private BaseUnit unit; 

    public float getPrice() 
    { 
     return price; 
    } 

    public void setPrice(float price) 
    { 
     this.price = price; 
    } 

    public BaseUnit getUnit() 
    { 
     return unit; 
    } 

    public void setUnit(BaseUnit unit) 
    { 
     this.unit = unit; 
    } 

    public int getDefaultAmount() 
    { 
     return defaultAmount; 
    } 

    public void setDefaultAmount(int defaultAmount) 
    { 
     this.defaultAmount = defaultAmount; 
    } 

    public int getAmount() 
    { 
     return amount; 
    } 

    public void setAmount(int amount) 
    { 
     this.amount = amount; 
    } 

    public void add(int additional) 
    { 
     this.amount += additional; 
    } 

    public void add_default_amount() 
    { 
     this.add(this.defaultAmount); 
    } 
} 

Recette

package com.android.droidfridge.data; 

import java.io.Serializable; 
import java.util.Collection; 
import java.util.Iterator; 

import com.j256.ormlite.field.DatabaseField; 
import com.j256.ormlite.field.ForeignCollectionField; 
import com.j256.ormlite.table.DatabaseTable; 

@DatabaseTable(tableName = "recipes") 
public class Recipe extends Foodstuff implements Serializable 
{ 
    private static final long serialVersionUID = 635229962897104194L; 

    @DatabaseField(useGetSet = true) 
    private int duration; 

    @ForeignCollectionField(eager = true) 
    private Collection<Foodstuff> ingredients; 

    public int getDuration() 
    { 
     return duration; 
    } 

    public void setDuration(int duration) 
    { 
     this.duration = duration; 
    } 

    public Collection<Foodstuff> getIngredients() 
    { 
     return ingredients; 
    } 

    public void setIngredients(Collection<Foodstuff> ingredients) { 
     this.ingredients = ingredients; 
    } 

    public Foodstuff getIngredient(Foodstuff ingredient) 
    { 
     if(ingredients.contains(ingredient)) 
     { 
      Iterator<Foodstuff> iterator = ingredients.iterator(); 
      boolean check = true; 
      while(check) 
      { 
       if(iterator.equals(ingredient)) 
        return (Foodstuff) iterator; 

       if(iterator.hasNext()) 
        iterator.next(); 
       else 
        check = false; 
      } 
     } 

     return null; 
    } 

    public void addIngredient(Ingredient ingredient) 
    { 
     ingredients.add(ingredient); 
    } 

    public void removeIngredient(Foodstuff ingredient) 
    { 
     ingredients.remove(ingredient); 
    } 

    public int sizeOfIngredients() 
    { 
     return ingredients.size(); 
    } 
} 

Catégorie package com.android.droidfridge.data;

import java.io.Serializable; 

import com.j256.ormlite.field.DatabaseField; 
import com.j256.ormlite.table.DatabaseTable; 

@DatabaseTable(tableName = "categories") 
public class Category implements Serializable 
{ 
private static final long serialVersionUID = -2222256865380949570L; 

@DatabaseField(id = true, useGetSet = true) 
private String name; 

public String getName() 
{ 
    return name; 
} 

public void setName(String name) 
{ 
    this.name = name; 
} 
} 

Les produits alimentaires peuvent être des ingrédients ou des recettes. Les recettes sont des ingrédients ou d'autres recettes. Chaque ingrédient et recette a une catégorie.

Je sauvegarde chaque catégorie, ingrédient et recette. Mais, quand je commence mon application, le journal montre des erreurs comme suit:

11-23 21:50:16.493: I/TableUtils(261): creating table 'ingredients' 
11-23 21:50:16.513: I/TableUtils(261): executed create table statement changed 1 rows: CREATE TABLE `ingredients` (`unit` VARCHAR , `defaultAmount` INTEGER , `price` FLOAT , `amount` INTEGER , `category_id` VARCHAR , `name` VARCHAR , `image` INTEGER , PRIMARY KEY (`name`)) 
11-23 21:50:16.603: D/dalvikvm(261): GC_FOR_MALLOC freed 8647 objects/515488 bytes in 44ms 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261): Unable to create databases, sorry dude! 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261): java.sql.SQLException: Foreign collection object class com.android.droidfridge.data.Foodstuff for field 'ingredients' does not contain a foreign field of class class com.android.droidfridge.data.Recipe 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.field.FieldType.configDaoInformation(FieldType.java:345) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.BaseDaoImpl.initialize(BaseDaoImpl.java:171) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.BaseDaoImpl.<init>(BaseDaoImpl.java:118) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.BaseDaoImpl.<init>(BaseDaoImpl.java:97) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.BaseDaoImpl$3.<init>(BaseDaoImpl.java:782) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.BaseDaoImpl.createDao(BaseDaoImpl.java:782) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.DaoManager.createDao(DaoManager.java:74) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.table.TableUtils.createTable(TableUtils.java:218) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.table.TableUtils.createTable(TableUtils.java:53) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.android.droidfridge.data.DatabaseHelper.onCreate(DatabaseHelper.java:35) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper.onCreate(OrmLiteSqliteOpenHelper.java:168) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:106) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.android.AndroidConnectionSource.getReadWriteConnection(AndroidConnectionSource.java:60) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.j256.ormlite.dao.BaseDaoImpl.create(BaseDaoImpl.java:286) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.android.droidfridge.ListActivity.createIngredient(ListActivity.java:88) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.android.droidfridge.ListActivity.onCreate(ListActivity.java:45) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.widget.TabHost.setCurrentTab(TabHost.java:323) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.view.View.performClick(View.java:2408) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.view.View$PerformClick.run(View.java:8816) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.os.Handler.handleCallback(Handler.java:587) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.os.Handler.dispatchMessage(Handler.java:92) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.os.Looper.loop(Looper.java:123) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at java.lang.reflect.Method.invokeNative(Native Method) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at java.lang.reflect.Method.invoke(Method.java:521) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
11-23 21:50:16.663: E/com.android.droidfridge.data.DatabaseHelper(261):  at dalvik.system.NativeStart.main(Native Method) 
11-23 21:50:16.843: I/Database(261): sqlite returned: error code = 1, msg = no such table: categories 
11-23 21:50:16.843: W/System.err(261): java.sql.SQLException: Unable to run insert stmt on object com.android.droidfridge.data.Category@44ec4070: INSERT INTO `categories` (`name`) VALUES (?) 
11-23 21:50:16.853: W/System.err(261): at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) 
11-23 21:50:16.853: W/System.err(261): at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:117) 
11-23 21:50:16.853: W/System.err(261): at com.j256.ormlite.stmt.StatementExecutor.create(StatementExecutor.java:341) 
11-23 21:50:16.853: W/System.err(261): at com.j256.ormlite.dao.BaseDaoImpl.create(BaseDaoImpl.java:288) 
11-23 21:50:16.853: W/System.err(261): at com.android.droidfridge.ListActivity.createIngredient(ListActivity.java:88) 
11-23 21:50:16.853: W/System.err(261): at com.android.droidfridge.ListActivity.onCreate(ListActivity.java:45) 
11-23 21:50:16.853: W/System.err(261): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
11-23 21:50:16.853: W/System.err(261): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
11-23 21:50:16.853: W/System.err(261): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503) 
11-23 21:50:16.853: W/System.err(261): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127) 
11-23 21:50:16.863: W/System.err(261): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339) 
11-23 21:50:16.863: W/System.err(261): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651) 
11-23 21:50:16.863: W/System.err(261): at android.widget.TabHost.setCurrentTab(TabHost.java:323) 
11-23 21:50:16.863: W/System.err(261): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129) 
11-23 21:50:16.863: W/System.err(261): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453) 
11-23 21:50:16.863: W/System.err(261): at android.view.View.performClick(View.java:2408) 
11-23 21:50:16.863: W/System.err(261): at android.view.View$PerformClick.run(View.java:8816) 
11-23 21:50:16.863: W/System.err(261): at android.os.Handler.handleCallback(Handler.java:587) 
11-23 21:50:16.863: W/System.err(261): at android.os.Handler.dispatchMessage(Handler.java:92) 
11-23 21:50:16.863: W/System.err(261): at android.os.Looper.loop(Looper.java:123) 
11-23 21:50:16.863: W/System.err(261): at android.app.ActivityThread.main(ActivityThread.java:4627) 
11-23 21:50:16.863: W/System.err(261): at java.lang.reflect.Method.invokeNative(Native Method) 
11-23 21:50:16.873: W/System.err(261): at java.lang.reflect.Method.invoke(Method.java:521) 
11-23 21:50:16.873: W/System.err(261): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
11-23 21:50:16.873: W/System.err(261): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
11-23 21:50:16.873: W/System.err(261): at dalvik.system.NativeStart.main(Native Method) 
11-23 21:50:16.873: W/System.err(261): Caused by: java.sql.SQLException: inserting to database failed: INSERT INTO `categories` (`name`) VALUES (?) 
11-23 21:50:16.883: W/System.err(261): at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) 
11-23 21:50:16.883: W/System.err(261): at com.j256.ormlite.android.AndroidDatabaseConnection.insert(AndroidDatabaseConnection.java:102) 
11-23 21:50:16.883: W/System.err(261): at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:72) 
11-23 21:50:16.883: W/System.err(261): ... 24 more 
11-23 21:50:16.883: W/System.err(261): Caused by: android.database.sqlite.SQLiteException: no such table: categories: , while compiling: INSERT INTO `categories` (`name`) VALUES (?) 
11-23 21:50:16.893: W/System.err(261): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
11-23 21:50:16.893: W/System.err(261): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91) 
11-23 21:50:16.893: W/System.err(261): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64) 
11-23 21:50:16.893: W/System.err(261): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80) 
11-23 21:50:16.903: W/System.err(261): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36) 
11-23 21:50:16.903: W/System.err(261): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145) 
11-23 21:50:16.903: W/System.err(261): at com.j256.ormlite.android.AndroidDatabaseConnection.insert(AndroidDatabaseConnection.java:94) 
11-23 21:50:16.903: W/System.err(261): ... 25 more 
11-23 21:50:16.903: I/Database(261): sqlite returned: error code = 1, msg = no such table: categories 
11-23 21:50:16.903: I/Database(261): [ 11-23 21:50:17.044 261:0x105 I/java.sql.SQLException: queryForOne from database failed: SELECT * FROM `categories` WHERE `nObject Error 
11-23 21:50:17.044: I/Database(261): sqlite returned: error code = 1, msg = no such table: categories 
11-23 21:50:17.044: W/System.err(261): java.sql.SQLException: Unable to run insert stmt on object com.android.droidfridge.data.Category@44ee01b8: INSERT INTO `categories` (`name`) VALUES (?) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:117) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.stmt.StatementExecutor.create(StatementExecutor.java:341) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.dao.BaseDaoImpl.create(BaseDaoImpl.java:288) 
11-23 21:50:17.053: W/System.err(261): at com.android.droidfridge.ListActivity.createIngredient(ListActivity.java:88) 
11-23 21:50:17.053: W/System.err(261): at com.android.droidfridge.ListActivity.onCreate(ListActivity.java:46) 
11-23 21:50:17.053: W/System.err(261): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
11-23 21:50:17.053: W/System.err(261): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
11-23 21:50:17.053: W/System.err(261): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503) 
11-23 21:50:17.053: W/System.err(261): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127) 
11-23 21:50:17.053: W/System.err(261): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339) 
11-23 21:50:17.053: W/System.err(261): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651) 
11-23 21:50:17.053: W/System.err(261): at android.widget.TabHost.setCurrentTab(TabHost.java:323) 
11-23 21:50:17.053: W/System.err(261): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129) 
11-23 21:50:17.053: W/System.err(261): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453) 
11-23 21:50:17.053: W/System.err(261): at android.view.View.performClick(View.java:2408) 
11-23 21:50:17.053: W/System.err(261): at android.view.View$PerformClick.run(View.java:8816) 
11-23 21:50:17.053: W/System.err(261): at android.os.Handler.handleCallback(Handler.java:587) 
11-23 21:50:17.053: W/System.err(261): at android.os.Handler.dispatchMessage(Handler.java:92) 
11-23 21:50:17.053: W/System.err(261): at android.os.Looper.loop(Looper.java:123) 
11-23 21:50:17.053: W/System.err(261): at android.app.ActivityThread.main(ActivityThread.java:4627) 
11-23 21:50:17.053: W/System.err(261): at java.lang.reflect.Method.invokeNative(Native Method) 
11-23 21:50:17.053: W/System.err(261): at java.lang.reflect.Method.invoke(Method.java:521) 
11-23 21:50:17.053: W/System.err(261): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
11-23 21:50:17.053: W/System.err(261): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
11-23 21:50:17.053: W/System.err(261): at dalvik.system.NativeStart.main(Native Method) 
11-23 21:50:17.053: W/System.err(261): Caused by: java.sql.SQLException: inserting to database failed: INSERT INTO `categories` (`name`) VALUES (?) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.android.AndroidDatabaseConnection.insert(AndroidDatabaseConnection.java:102) 
11-23 21:50:17.053: W/System.err(261): at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:72) 
11-23 21:50:17.053: W/System.err(261): ... 24 more 
11-23 21:50:17.053: W/System.err(261): Caused by: android.database.sqlite.SQLiteException: no such table: categories: , while compiling: INSERT INTO `categories` (`name`) VALUES (?) 
11-23 21:50:17.073: W/System.err(261): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
11-23 21:50:17.073: W/System.err(261): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91) 
11-23 21:50:17.073: W/System.err(261): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64) 
11-23 21:50:17.073: W/System.err(261): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80) 
11-23 21:50:17.073: W/System.err(261): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36) 
11-23 21:50:17.073: W/System.err(261): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145) 
11-23 21:50:17.073: W/System.err(261): at com.j256.ormlite.android.AndroidDatabaseConnection.insert(AndroidDatabaseConnection.java:94) 
11-23 21:50:17.073: W/System.err(261): ... 25 more 
11-23 21:50:17.073: I/Database(261): sqlite returned: error code = 1, msg = no such table: categories 
11-23 21:50:17.073: I/Database(261): [ 11-23 21:50:17.083 261:0x105 I/java.sql.SQLException: queryForOne from database failed: SELECT * FROM `categories` WHERE `nObject Error 
11-23 21:50:17.083: I/Database(261): sqlite returned: error code = 1, msg = no such table: categories 
11-23 21:50:17.083: E/Recipe(261): java.sql.SQLException: queryForOne from database failed: SELECT * FROM `categories` WHERE `name` = ? 

Question:

• Pourquoi puis-je pas créer la base de données de catégorie?
• Y a-t-il une erreur dans ma classe de recette dans l'attribut ingredients?

Answer 1

L'erreur ORMLite est l'exploitation forestière tente de fournir les informations pour vous aider à résoudre le problème:

SQLException: Foreign collection object class com.android.droidfridge.data.Foodstuff 
    for field 'ingredients' does not contain a foreign field of class 
    class com.android.droidfridge.data.Recipe 

Votre classe Recipe contient le champ suivant:

@ForeignCollectionField(eager = true) 
private Collection<Foodstuff> ingredients; 

Si vous recette a des ingrédients alors il doit y avoir un champ étranger dans Foodstuff pour le Recipe qui "le possède". Ce ORMLite permet de faire quelque chose comme:

SELECT * FROM foodstuff WHERE recipe_id = id; 

Par exemple, si vous avez un Account qui a un certain nombre de Order s puis chacun des objets Order devrait avoir un champ Account étranger. Voici la documentation pour foreign collections. Au lieu de cela, si vous allez avoir une recette inclure des ingrédients que d'autres recettes vont utiliser alors je pense que ce dont vous avez besoin est une "table de jointure" par opposition à une collection étrangère. Jetez un oeil à la "Many To Many" example qui utilise une table de jointure.