ActiveRecord::PreparedStatementInvalid in ArticlesController - ruby-on-rails

Question

I am trying to make an mini blog with Ruby on Rails. I have encountered this error when I wanted to add search action on articles_controller.rb. Search form is located at navbar. If the search form is blank, there is no error. If I typed something in the search form, this error,wrong number of bind variables (2 for 1) in: text LIKE ? or title LIKE appears.
error log
Started GET "/articles/search?utf8=%E2%9C%93&search=kawaii&commit=Search" for 127.0.0.1 at 2019-02-21 13:21:02 +0900
(0.4ms) SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
↳ /Users/igarashinobuo/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/activerecord-5.2.2/lib/active_record/log_subscriber.rb:98
Processing by ArticlesController#search as HTML
Parameters: {"utf8"=>"✓", "search"=>"kawaii", "commit"=>"Search"}
Completed 500 Internal Server Error in 14ms (ActiveRecord: 0.0ms)
ActiveRecord::PreparedStatementInvalid (wrong number of bind variables (2 for 1) in: text LIKE ? or title LIKE):
app/models/article.rb:8:in search'
app/controllers/articles_controller.rb:23:insearch'
controllers/articles_controller.rb
def search
if params[:search].blank?
#articles = Article.all
else
#articles = Article.search(params)
end
end
models/article.rb
def self.search(params)
articles = Article.where("text LIKE ? or title LIKE", "%#
{params[:search]}%", "%#{params[:search]}%") if params[:search].present?
articles
end
end
views/articles/search.html.erb
<div class="row">
<div class="col"></div>
<div class="col-md-10">
<h1>
記事リスト</h1>
<p>
<%= link_to '新規記事作成', new_article_path, class:'btn btn-lg btn-info' %>
</p>
<table class="table table-hover table-striped table-responsive-xs table-info">
<thead>
<tr>
<th>Title</th>
<th>Text</th>
<th colspan="3">Editing Options</th>
</tr>
</thead>
<tbody>
<% #articles.each do |article| %>
<tr>
<td>
<%= article.title %>
</td>
<td>
<%= truncate(article.text, length: 75) %>
</td>
<td>
<%= link_to 'SHOW', article_path(article), class: 'btn btn-sm btn-info' %>
</td>
<td>
<%= link_to 'Edit', edit_article_path(article), class: 'btn btn-sm btn-warning' %>
</td>
<td>
<%= link_to 'Delete',article_path(article), class: 'btn btn-sm btn-danger', method: :Delete, data: {confirm: '本当に削除しますか ?'} %>
</td>
</tr>
<% end %>
</tbody>
</table>
<p>
<%= link_to 'Home', welcome_index_path, class: 'btn btn-sm btn-info' %>
</p>
</div>
<div class="col"></div>
</div>

Answer 1

I think you're missing an ? for the second parameter of your query:
def self.search(params)
articles = Article.where("text LIKE ? or title LIKE ?", "%#
{params[:search]}%", "%#{params[:search]}%") if params[:search].present?
articles
end