Search by full name - ruby-on-rails

Question

I am trying to write a query that finds clients by their full name.
I have a model named Client with first name, last name, and middle name fields.
I also have this client_full_name method in my User model :
def client_full_name
"#{self.Client_fname} #{self.Client_mi} #{self.Client_lname}"
end
# FOR SEARCHES
def self.search_by_client_full_name(query)
where("client_full_name like ?", "%#{query}%")
end
I have this in my controller
def index
#FOR SEARCHES
if params[:search]
#clients = Client.search_by_client_full_name(params[:search])
else
#clients = Client.all
end
end
And I have this in my Index
<h2>Search for Clients</h2>
<%= form_tag(clients_path, :method => "get", id: "search-form") do %>
Search by Client Name: <br />
<%= text_field_tag :search, params[:search], placeholder: "Search Clients" %>
<%= submit_tag "Search", :client_full_name => nil %>
<% end %>
This is the Error that I keep getting
SQLite3::SQLException: no such column: client_full_name: SELECT "clients".* FROM "clients" WHERE (client_full_name like '%John Smith%')
Thank you for the help.

Answer 1

This can be solution for your question.
patient_first_name_cont = "Ajay"
patient_last_name_cont = "Kumar"
shared_context = Ransack::Context.for(Request)
search_parents = Request.includes(:request_status).ransack(
{ patient_first_name_cont: patient_first_name_cont }, context: shared_context
)
search_children = Request.includes(:request_status).ransack(
{ patient_last_name_cont: patient_last_name_cont }, context: shared_context
)
shared_conditions = [search_parents, search_children].map { |search| Ransack::Visitor.new.accept(search.base)}
#req = Request.joins(shared_context.join_sources).where(shared_conditions.reduce(&:and))

Answer 2

You method client_full_name is an instance method of class Client:
def client_full_name
"#{self.Client_fname} #{self.Client_mi} #{self.Client_lname}"
end
It ( client_full_name ) is not a column(at least it doesn't appear to be) of your clients table. That's why you're getting this error:
SQLite3::SQLException: no such column: client_full_name: SELECT "clients".* FROM "clients" WHERE (client_full_name like '%John Smith%')
to make your query work, you need to change your method search_by_client_full_name to this(NOTE- Query below will work only for MySQL):
def self.search_by_client_full_name(query)
where("CONCAT_WS(' ', Client_fname, Client_mi, Client_lname) LIKE :q", :q => "%#{query}%")
end
For SQLite you can use || for concatenation:
def self.search_by_client_full_name(query)
where("(Client_fname || Client_mi || Client_lname) LIKE :q", :q => "%#{query}%")
end
But || will return NULL if any of the column has NULL, to avoid that you'll have to write case