com presentations: Add MongoCollection::remove() example: mongo-tut-tek15.xml slides/mongodb/remove.xml

Commit:    2ecb53447c2662882c60817c996c64d64ba0792f
Author:    Jeremy Mikola <[email protected]>         Sun, 17 May 2015 15:30:45 -0500
Parents:   613a7ed41708c6182aa15278fbfc1a546dbf3eae
Branches:  master

Link:       http://git.php.net/?p=presentations.git;a=commitdiff;h=2ecb53447c2662882c60817c996c64d64ba0792f

Log:
Add MongoCollection::remove() example

Changed paths:
  M  mongo-tut-tek15.xml
  A  slides/mongodb/remove.xml


Diff:
diff --git a/mongo-tut-tek15.xml b/mongo-tut-tek15.xml
index 5cc047a..45de045 100644
--- a/mongo-tut-tek15.xml
+++ b/mongo-tut-tek15.xml
@@ -70,6 +70,7 @@
 
 
 <slide>slides/mongodb/update2a.xml</slide>
+<slide>slides/mongodb/remove.xml</slide>
 
 <!-- SCHEMA DESIGN -->
 <slide>slides/mongodb/section-schema-design.xml</slide>
diff --git a/slides/mongodb/remove.xml b/slides/mongodb/remove.xml
new file mode 100644
index 0000000..990ea04
--- /dev/null
+++ b/slides/mongodb/remove.xml
@@ -0,0 +1,22 @@
+<slide>
+<title>Deleting documents</title>
+
+<blurb>Unlike %update%, %remove% deletes *all* matched documents by default.</blurb>
+
+<blurb>You can set an option to remove only the *first* matched document</blurb>
+
+<example result="0"><![CDATA[<?php
+$m = new MongoClient;
+$c = $m->demo->products;
+$c->drop();
+
+$c->insert( [ '_id' => 'blue-elephpant',  'generation' => 1, 'price' => 7.5 ] );
+$c->insert( [ '_id' => 'pink-elephpant',  'generation' => 2, 'price' => 8.0 ] );
+$c->insert( [ '_id' => 'green-elephpant', 'generation' => 3, 'price' => 7.5 ] );
+
+$c->remove(
+    [ 'price' => [ '$lt' => 8.0 ] ],  // criteria
+    [ 'justOne' => true ]             // options: justOne
+);
+?>]]></example>
+</slide>