I created a entity.

$fields['supplemental'] = BaseFieldDefinition::create('text_long')
                ->setDescription(t('Answer description.'))
                ->setDisplayOptions('view', array(
                    'label' => 'hidden',
                    'type' => 'text_default',
                    'weight' => -3,
                ->setDisplayOptions('form', array(
                    'type' => 'text_textfield',
                    'weight' => -3,
                ->setDisplayConfigurable('form', TRUE)
                ->setDisplayConfigurable('view', TRUE);

And I'm saving data into this entity's field like

$mcq = Mcq::create(array(
           'supplemental__value' => $value->supplemental,

Issue is all fields gets populated except of type 'text_long'. Am I missing something or there is any other way of populating entity field values.


After realising few minutes later, the column name should be supplemental not supplemental__value.

I was mapping content by looking into database columns which was wrong.

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