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Create Message Table

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xfarrow 2023-10-17 12:03:56 +02:00
parent b1fca4f751
commit 0fe0f2abb4
1 changed files with 42 additions and 0 deletions
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backend/sql/6-create-message.sql Normal file
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-- Table: public.Message
-- DROP TABLE IF EXISTS public."Message";
CREATE TABLE IF NOT EXISTS public."Message"
(
id serial NOT NULL,
person_id integer NOT NULL,
organization_id integer NOT NULL,
author_on_behalf_of_organization integer,
"timestamp" timestamp without time zone NOT NULL,
content character varying(4096) COLLATE pg_catalog."default" NOT NULL,
sender_type character varying(12) COLLATE pg_catalog."default" NOT NULL,
CONSTRAINT "Message_pkey" PRIMARY KEY (id),
CONSTRAINT "Message_author_on_behalf_of_company_fkey" FOREIGN KEY (author_on_behalf_of_organization)
REFERENCES public."Person" (id) MATCH SIMPLE
ON UPDATE NO ACTION
ON DELETE CASCADE,
CONSTRAINT "Message_organization_id_fkey" FOREIGN KEY (organization_id)
REFERENCES public."Organization" (id) MATCH SIMPLE
ON UPDATE NO ACTION
ON DELETE CASCADE,
CONSTRAINT "Message_person_id_fkey" FOREIGN KEY (person_id)
REFERENCES public."Person" (id) MATCH SIMPLE
ON UPDATE NO ACTION
ON DELETE CASCADE,
CONSTRAINT "Message_sender_type_check" CHECK (sender_type::text = 'ORGANIZATION'::text OR sender_type::text = 'PERSON'::text),
CONSTRAINT "Message_sender_constraint" CHECK (author_on_behalf_of_organization IS NULL AND sender_type::text = 'PERSON'::text OR author_on_behalf_of_organization IS NOT NULL AND sender_type::text = 'ORGANIZATION'::text)
)
TABLESPACE pg_default;
ALTER TABLE IF EXISTS public."Message"
OWNER to postgres;
COMMENT ON COLUMN public."Message".sender_type
IS 'sender_type can be either be PERSON or ORGANIZATION, depending who''s sending the message. It is PERSON if and only if author_on_behalf_of_organization is NULL. It is ORGANIZATION if and only if author_on_behalf_of_organization is NOT NULL. This column may seem redundant if we already know how to identify a sender, but it does give more clarity to the API implementers';
COMMENT ON CONSTRAINT "Message_sender_type_check" ON public."Message"
IS 'We want the sender to be either PERSON or ORGANIZATION';
COMMENT ON CONSTRAINT "Message_sender_constraint" ON public."Message"
IS 'If ''author_on_behalf_of_organization'' is NULL, then the sender is a person, instead, if ''author_on_behalf_of_organization'' is not NULL, the sender is a organization';