diff options
| -rw-r--r-- | guides/source/active_record_querying.md | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/guides/source/active_record_querying.md b/guides/source/active_record_querying.md index 0f9b2c28a5..57e8e080f4 100644 --- a/guides/source/active_record_querying.md +++ b/guides/source/active_record_querying.md @@ -473,7 +473,7 @@ In the case of a belongs_to relationship, an association key can be used to spec ```ruby Post.where(author: author) -Author.joins(:post).where(posts: {author: author}) +Author.joins(:posts).where(posts: {author: author}) ``` NOTE: The values cannot be symbols. For example, you cannot do `Client.where(status: :active)`. @@ -975,7 +975,7 @@ Now all of the following will produce the expected join queries using `INNER JOI #### Joining a Single Association ```ruby -Category.joins(:post) +Category.joins(:posts) ``` This produces: @@ -990,7 +990,7 @@ Or, in English: "return a Category object for all categories with posts". Note t #### Joining Multiple Associations ```ruby -Post.joins(:category, :comment) +Post.joins(:category, :comments) ``` This produces: @@ -1041,14 +1041,14 @@ You can specify conditions on the joined tables using the regular [Array](#array ```ruby time_range = (Time.now.midnight - 1.day)..Time.now.midnight -Client.joins(:order).where('orders.created_at' => time_range) +Client.joins(:orders).where('orders.created_at' => time_range) ``` An alternative and cleaner syntax is to nest the hash conditions: ```ruby time_range = (Time.now.midnight - 1.day)..Time.now.midnight -Client.joins(:order).where(orders: {created_at: time_range}) +Client.joins(:orders).where(orders: {created_at: time_range}) ``` This will find all clients who have orders that were created yesterday, again using a `BETWEEN` SQL expression. @@ -1101,7 +1101,7 @@ Active Record lets you eager load any number of associations with a single `Mode #### Array of Multiple Associations ```ruby -Post.includes(:category, :comment) +Post.includes(:category, :comments) ``` This loads all the posts and the associated category and comments for each post. @@ -1121,7 +1121,7 @@ Even though Active Record lets you specify conditions on the eager loaded associ However if you must do this, you may use `where` as you would normally. ```ruby -Post.includes(:comment).where("comments.visible" => true) +Post.includes(:comments).where("comments.visible" => true) ``` This would generate a query which contains a `LEFT OUTER JOIN` whereas the `joins` method would generate one using the `INNER JOIN` function instead. |