Document new get_siblings() method.

get_prev_sibling and get_next_sibling removed in https://github.com/lektor/lektor/pull/118

content/docs/api/db/record/get_next_sibling/contents.lr

@@ -1,24 +0,0 @@
-title: get_next_sibling
----
-summary: Returns the next record.
----
-type: method
----
-body:
-
-Get the next record in this record's parent's list of children.
-
-If the parent record has pagination enabled, then `get_prev_sibling` and
-`get_next_sibling` use the pagination query to filter and order the children.
-Otherwise, the parent's standard configuration for children is used.
-See [the pagination guide :ref](../../../../guides/pagination/) and the
-[page order guide :ref](../../../../guides/page-order/).
-
-## Example
-
-```html+jinja
-{% set newer = this.get_next_sibling() %}
-{% if newer %}
-<a href="{{ newer|url }}">Next article: {{ newer.title }}</a>
-{% endif %}
-```

content/docs/api/db/record/get_previous_sibling/contents.lr

@@ -1,24 +0,0 @@
-title: get_prev_sibling
----
-summary: Returns the previous record.
----
-type: method
----
-body:
-
-Get the previous record in this record's parent's list of children.
-
-If the parent record has pagination enabled, then `get_prev_sibling` and
-`get_next_sibling` use the pagination query to filter and order the children.
-Otherwise, the parent's standard configuration for children is used.
-See [the pagination guide :ref](../../../../guides/pagination/) and the
-[page order guide :ref](../../../../guides/page-order/).
-
-## Example
-
-```html+jinja
-{% set older = this.get_prev_sibling() %}
-{% if older %}
-<a href="{{ older|url }}">Previous article: {{ older.title }}</a>
-{% endif %}
-```

content/docs/api/db/record/get_siblings/contents.lr

@@ -0,0 +1,34 @@
+title: get_siblings
+---
+summary: The previous and next children of this page's parent.
+---
+type: method
+---
+body:
+
+Get the previous and next record in this record's parent's list of children.
+
+The returned object has attributes `prev_page` and `next_page`.
+Each can be a [Record :ref](../) or `None`.
+
+If the parent record has pagination enabled, then use the pagination query to
+filter and order the children. Otherwise, the parent's standard configuration
+for children is used.
+See [the pagination guide :ref](../../../../guides/pagination/) and the
+[page order guide :ref](../../../../guides/page-order/).
+
+## Example
+
+```html+jinja
+{% set siblings = this.get_siblings() %}
+
+{% if siblings.prev_page %}
+  <a href="{{ siblings.prev_page|url }}">previous</a>
+{% endif %}
+
+{% if siblings.next_page %}
+  <a href="{{ siblings.next_page|url }}">next</a>
+{% endif %}
+```
+
+See also: [has_prev :ref](../has_prev/) and [has_next :ref](../has_next/).

content/docs/api/db/record/has_next/contents.lr

@@ -0,0 +1,27 @@
+title: has_next
+---
+summary: Whether the record has a next sibling.
+---
+type: method
+---
+body:
+
+True if there is a next record in the parent's list of children.
+
+If the parent record has pagination enabled, then use the pagination query to
+filter and order the children. Otherwise, the parent's standard configuration
+for children is used.
+See [the pagination guide :ref](../../../../guides/pagination/) and the
+[page order guide :ref](../../../../guides/page-order/).
+
+## Example
+
+```html+jinja
+{% if this.has_next() %}
+  <a href="{{ this.get_siblings().next_page|url }}">next</a>
+{% else %}
+  <p>This is the last entry.
+{% endif %}
+```
+
+See also: [has_prev :ref](../has_prev/) and [get_siblings :ref](../get_siblings/).

content/docs/api/db/record/has_prev/contents.lr

@@ -0,0 +1,27 @@
+title: has_prev
+---
+summary: Whether the record has a previous sibling.
+---
+type: method
+---
+body:
+
+True if there is a previous record in the parent's list of children.
+
+If the parent record has pagination enabled, then use the pagination query to
+filter and order the children. Otherwise, the parent's standard configuration
+for children is used.
+See [the pagination guide :ref](../../../../guides/pagination/) and the
+[page order guide :ref](../../../../guides/page-order/).
+
+## Example
+
+```html+jinja
+{% if this.has_prev() %}
+  <a href="{{ this.get_siblings().prev_page|url }}">previous</a>
+{% else %}
+  <p>This is the first entry.
+{% endif %}
+```
+
+See also: [has_next :ref](../has_next/) and [get_siblings :ref](../get_siblings/).