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POORMLite on Android: Getting NullPointerException when trying to read data from object
 

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  1. POORMLite on Android: Getting NullPointerException when trying to read data from object
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    <p>In my application I have several persisted models and in one case I'm getting exception when trying to get data using corresponding getter. But there is data in tha DB and I have no idea why getter returns nothing. Answer class:</p> <pre><code>@DatabaseTable @JsonRootName(value = "answer") public class Answer { public Answer() {} @DatabaseField(generatedId = true, columnName = "_id") @JsonIgnore private Integer id; @DatabaseField @JsonProperty(value = "id") private Integer answer_id; @DatabaseField(dataType = DataType.LONG_STRING) private String text; // some other fields and setters/getters public String getText() { return text; } public void setText(String text) { this.text = text; } } </code></pre> <p>Question class:</p> <pre><code>@DatabaseTable public class Question extends BaseDaoEnabled implements Serializable { private static final long serialVersionUID = -7587892134579897L; public Question() { } @DatabaseField(foreign = true, foreignAutoRefresh = true) private Answer answer; } </code></pre> <p>Quest class:</p> <pre><code>@DatabaseTable(tableName = "quests") @JsonRootName(value = "quest") public class Quest { @DatabaseField(allowGeneratedIdInsert = true, generatedId = true, columnName = "_id") private Integer id; @DatabaseField(dataType = DataType.DATE_STRING) Date created_at; @DatabaseField(foreign = true) private Survey survey; @ForeignCollectionField(eager = false, orderColumnName = "question_id") public Collection&lt;Question&gt; questions; </code></pre> <p>Answer creation:</p> <pre><code> answer.setText(input.getText().toString()); try { if (answer.getId() == null) { DBHelperFactory.GetHelper().getAnswersDao().create(answer); question.setAnswer(answer); DBHelperFactory.GetHelper().getQuestionsDao().update(question); } else { DBHelperFactory.GetHelper().getAnswersDao().update(answer); } Toast.makeText(this.getActivity(), "Answer saved", 5).show(); listener.nextQuestion(); } catch (SQLException e) { Log.e(LOG_KEY, "Create failed", e); } </code></pre> <p>And the failing code, (quest is passed in to the function that is running in the background)</p> <pre><code>for (Question question : quest.questions) { if (question.getAnswer() != null) { Log.d(LOG_KEY, question.getId().toString()); Log.d(LOG_KEY, question.getAnswer().getId().toString()); Log.d(LOG_KEY, question.getAnswer().getText()); // NullPointerException for getText(). } } </code></pre> <p><code>getAnswer()</code> indeed returns Answer. Data in DB persisted. But <code>getText()</code> is failing. Can anyone please help me to find out where I am wrong?</p>
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    1. PO
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    1. This table or related slice is empty.
    1. PTQuestion
    1. USVladson
    1. USVladson
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COwhere are you setting the text of the answer?
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      1. POORMLite on Android: Getting NullPointerException when trying to read data from object
      1. USDmitryK
    2. COoh i see, you sure that answer.setText(input.getText().toString()); gets executes correctly?
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      1. POORMLite on Android: Getting NullPointerException when trying to read data from object
      1. USDmitryK
    3. COYes, because when i dump the db from device (emulator) end look what it exactly contains i can see the data added.
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      1. POORMLite on Android: Getting NullPointerException when trying to read data from object
      1. USVladson
 

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