contains method
You can invoke this method to add a query condition in which the value of a field in an entity class contains a specified substring.
Supports the following data types:
- String for String, and Text.
Implementation
void contains(String field, String value) {
if (field.isEmpty) {
throw FormatException('field cannot be an empty string.', field);
}
_queryElements.add(
<String, dynamic>{
_QueryConstants.FIELD: field,
_QueryConstants.OPERATION: _QueryConstants.CONTAINS,
_QueryConstants.VALUE: value,
},
);
}