{"action":"created","comment":{"url":"https://api.github.com/repos/realm/realm-java/pulls/comments/29855707","id":29855707,"diff_hunk":"@@ -386,6 +410,10 @@ public String getPrimaryKeyGetter() {\n         return getters.get(primaryKey.getSimpleName().toString());\n     }\n \n+    public boolean isNullable(String fieldName) {","path":"realm-annotations-processor/src/main/java/io/realm/processor/ClassMetaData.java","position":56,"original_position":56,"commit_id":"e4bcc141d6b5dd1b8f79fcb216148b5f8ed69676","original_commit_id":"e4bcc141d6b5dd1b8f79fcb216148b5f8ed69676","user":{"login":"emanuelez","id":473050,"avatar_url":"https://avatars.githubusercontent.com/u/473050?v=3","gravatar_id":"","url":"https://api.github.com/users/emanuelez","html_url":"https://github.com/emanuelez","followers_url":"https://api.github.com/users/emanuelez/followers","following_url":"https://api.github.com/users/emanuelez/following{/other_user}","gists_url":"https://api.github.com/users/emanuelez/gists{/gist_id}","starred_url":"https://api.github.com/users/emanuelez/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/emanuelez/subscriptions","organizations_url":"https://api.github.com/users/emanuelez/orgs","repos_url":"https://api.github.com/users/emanuelez/repos","events_url":"https://api.github.com/users/emanuelez/events{/privacy}","received_events_url":"https://api.github.com/users/emanuelez/received_events","type":"User","site_admin":false},"body":"maybe rename to `isFieldNullable` and consider if it should take a VariableElement instead","created_at":"2015-05-07T14:18:53Z","updated_at":"2015-05-07T14:18:53Z","html_url":"https://github.com/realm/realm-java/pull/1098#discussion_r29855707","pull_request_url":"https://api.github.com/repos/realm/realm-java/pulls/1098","_links":{"self":{"href":"https://api.github.com/repos/realm/realm-java/pulls/comments/29855707"},"html":{"href":"https://github.com/realm/realm-java/pull/1098#discussion_r29855707"},"pull_request":{"href":"https://api.github.com/repos/realm/realm-java/pulls/1098"}}},"pull_request":{"url":"https://api.github.com/repos/realm/realm-java/pulls/1098","id":34919223,"html_url":"https://github.com/realm/realm-java/pull/1098","diff_url":"https://github.com/realm/realm-java/pull/1098.diff","patch_url":"https://github.com/realm/realm-java/pull/1098.patch","issue_url":"https://api.github.com/repos/realm/realm-java/issues/1098","number":1098,"state":"open","locked":false,"title":"[WIP] Support for null strings","user":{"login":"kneth","id":1225363,"avatar_url":"https://avatars.githubusercontent.com/u/1225363?v=3","gravatar_id":"","url":"https://api.github.com/users/kneth","html_url":"https://github.com/kneth","followers_url":"https://api.github.com/users/kneth/followers","following_url":"https://api.github.com/users/kneth/following{/other_user}","gists_url":"https://api.github.com/users/kneth/gists{/gist_id}","starred_url":"https://api.github.com/users/kneth/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kneth/subscriptions","organizations_url":"https://api.github.com/users/kneth/orgs","repos_url":"https://api.github.com/users/kneth/repos","events_url":"https://api.github.com/users/kneth/events{/privacy}","received_events_url":"https://api.github.com/users/kneth/received_events","type":"User","site_admin":false},"body":"Support for null values is a popular feature request (see #478). Realm Core has an experimental/work-in-progress version with support for null strings. In order to validate the concept of null strings, Realm for Android is experimentally adding support for it.\r\n\r\nA new annotation (`@NotNNullable) is introduced. `String`s are nullable by default, but you can specify that it is not nullable. Moreover, primary keys cannot be null.\r\n\r\nQuerying with null has a special semantic. Every string begins with, ends with and contains null strings.\r\n\r\nIf a field is nullable, the default value when creating an object is null while a not nullable string field is the empty string (`\"\"`) in Realm. The JSON methods in Realm and the proxy classes follow these rules too.\r\n\r\n**Note**: This branch will _not_ be merged into master for a while.\r\n\r\n@bmunkholm @emanuelez 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