add --field arg to 'wp post get'

diff --git a/features/post.feature b/features/post.feature
index 8d6816a..8b78447 100644 (file)
--- a/features/post.feature
+++ b/features/post.feature
@@ -50,7 +50,7 @@ Feature: Manage WordPress posts
       excerpt
       """
 
-    When I run `wp post get --format=content {POST_ID}`
+    When I run `wp post get --field=content {POST_ID}`
     Then STDOUT should be:
       """
       This is some content.

diff --git a/php/commands/post.php b/php/commands/post.php
index 5b8a734..dc1d1d2 100644 (file)
--- a/php/commands/post.php
+++ b/php/commands/post.php
@@ -138,11 +138,13 @@ class Post_Command extends \WP_CLI\CommandWithDBObject {
         * <id>
         * : The ID of the post to get.
         *
+        * [--field=<field>]
+        * : Instead of returning the whole post, returns the value of a single field. The --format=
+        *   parameter is ignored in this case.
+        *
         * [--format=<format>]
         * : The format to use when printing the post, acceptable values:
         *
-        *   - **content**: Outputs only the post's content.
-        *
         *   - **table**: Outputs all fields of the post as a table. Note that the
         *     post_content field is omitted so that the table is readable.
         *
@@ -150,9 +152,8 @@ class Post_Command extends \WP_CLI\CommandWithDBObject {
         *
         * ## EXAMPLES
         *
-        *     wp post get 12 --format=content
-        *
-        *     wp post get 12 > file.txt
+        *         # save the post content to a file
+        *     wp post get 12 --field=content > file.txt
         */
        public function get( $args, $assoc_args ) {
                $defaults = array(
@@ -162,13 +163,32 @@ class Post_Command extends \WP_CLI\CommandWithDBObject {
 
                $post_id = $args[0];
                if ( !$post_id || !$post = get_post( $post_id ) )
-                       \WP_CLI::error( "Failed opening post $post_id to get." );
+                       \WP_CLI::error( "Could not find the post with ID $post_id." );
 
-               switch ( $assoc_args['format'] ) {
+               if ( isset( $assoc_args['field'] ) ) {
+                       self::show_single_field( $post, $assoc_args['field'] );
+               } else {
+                       self::show_multiple_fields( $post, $assoc_args );
+               }
+       }
 
-               case 'content':
-                       WP_CLI::print_value( $post->post_content );
-                       break;
+       private function show_single_field( $post, $field ) {
+               $value = null;
+
+               foreach ( array( $field, "post_$field" ) as $key ) {
+                       if ( isset( $post->$key ) )
+                               $value = $post->$key;
+               }
+
+               if ( null === $value ) {
+                       \WP_CLI::error( "Invalid post field: $field." );
+               } else {
+                       WP_CLI::print_value( $value );
+               }
+       }
+
+       private function show_multiple_fields( $post, $assoc_args ) {
+               switch ( $assoc_args['format'] ) {
 
                case 'table':
                        $fields = get_object_vars( $post );