Syntax error raw sql on rails when query inner results - postgresql

Question

how do you query raw SQL on rails?
So I have this raw sql that I need to run on rails but giving me a syntax error. I also escape the extra parenthesis but still got a syntax error near the first inner join.
here's my code:
Spree::CorporateAccount.joins(" (((((
( inner join spree_memberships on spree_corporate_accounts.id = spree_memberships.corporate_account_id)
inner join spree_users on spree_memberships.user_id = spree_users.id)
left join spree_variant_price_sets on spree_corporate_accounts.variant_price_set_id = spree_variant_price_sets.id)
left join spree_addresses on spree_corporate_accounts.bill_address_id = spree_addresses.id)
left join spree_states on spree_addresses.state_id = spree_states.id)
left join spree_countries on spree_addresses.country_id = spree_countries.id)
left join spree_partner_accounts on spree_corporate_accounts.id = spree_partner_accounts.partnerable_id
").where(" spree_memberships.deleted_at IS null
AND (spree_partner_accounts.partnerable_type = 'Spree::CorporateAccount' OR spree_partner_accounts.partnerable_type IS NULL)
AND admin = true
")
but on sql this is perfectly fine.
SELECT
spree_corporate_accounts.id,
spree_corporate_accounts.company_name,
spree_memberships.ADMIN,
spree_users.email,
spree_users.doctor AS name,
spree_partner_accounts.account_key,
CASE spree_corporate_accounts.billing_type when 1 THEN 'Postbill' WHEN 2 THEN 'Creditcard' ELSE 'Individual'END,
spree_variant_price_sets.name AS priceset,
spree_addresses.address1,
spree_addresses.address2,
spree_addresses.city,
spree_addresses.zipcode,
spree_states.name AS state,
spree_countries.name AS country,
spree_addresses.phone,
spree_users.created_at
from (((((( spree_corporate_accounts inner join spree_memberships on spree_corporate_accounts.id = spree_memberships.corporate_account_id)
inner join spree_users on spree_memberships.user_id = spree_users.id)
left join spree_variant_price_sets on spree_corporate_accounts.variant_price_set_id = spree_variant_price_sets.id)
left join spree_addresses on spree_corporate_accounts.bill_address_id = spree_addresses.id)
left join spree_states on spree_addresses.state_id = spree_states.id)
left join spree_countries on spree_addresses.country_id = spree_countries.id)
left join spree_partner_accounts on spree_corporate_accounts.id = spree_partner_accounts.partnerable_id
where spree_memberships.deleted_at IS null
and (spree_partner_accounts.partnerable_type = 'Spree::CorporateAccount' OR spree_partner_accounts.partnerable_type IS NULL )
AND admin = true
if I do this. It will yield a different result. so what im thinking is the parenthesis evaluate the result first and then go to the next.
Spree::CorporateAccount.joins("inner join spree_memberships on spree_corporate_accounts.id = spree_memberships.corporate_account_id")
.joins("inner join spree_users on spree_memberships.user_id = spree_users.id")
.joins("left join spree_variant_price_sets on spree_corporate_accounts.variant_price_set_id = spree_variant_price_sets.id")
.joins("left join spree_addresses on spree_corporate_accounts.bill_address_id = spree_addresses.id")
.joins("left join spree_states on spree_addresses.state_id = spree_states.id")
.joins("left join spree_countries on spree_addresses.country_id = spree_countries.id")
.joins("left join spree_partner_accounts on spree_corporate_accounts.id = spree_partner_accounts.partnerable_id ")
.where("spree_memberships.deleted_at IS null
AND spree_partner_accounts.partnerable_type = 'Spree::CorporateAccount' OR spree_partner_accounts.partnerable_type IS NULL
AND admin = true
")