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Add pagination on query find_articles_versions_by_*

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This commit is contained in:
Fabrice Lecomte
2019-09-05 17:09:05 +02:00
parent 4990015769
commit 6423491be3
3 changed files with 29 additions and 10 deletions
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15
src/main/resources/sql/functions/article/find_articles_versions_by_id.sql
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@@ -1,11 +1,18 @@
create or replace function find_articles_versions_by_id(in _id uuid, out resource json) language plpgsql as
create or replace function find_articles_versions_by_id(
_id uuid,
"limit" int default 50,
"offset" int default 0,
out resource json,
out total int
) language plpgsql as
$$
declare
_version_id uuid = (select version_id from article where id = _id);
begin
select find_articles_versions_by_version_id(_version_id)
into resource;
select a.resource, a.total
into resource, total
from find_articles_versions_by_version_id(_version_id, "limit", "offset") a;
end;
$$;
-- drop function if exists find_articles_versions_by_id(uuid, out json);
-- drop function if exists find_articles_versions_by_id(uuid, int, int, out json);

17
src/main/resources/sql/functions/article/find_articles_versions_by_version_id.sql
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@@ -1,8 +1,16 @@
create or replace function find_articles_versions_by_version_id(in _version_id uuid, out resource json) language plpgsql as
create or replace function find_articles_versions_by_version_id(
_version_id uuid,
"limit" int default 50,
"offset" int default 0,
out resource json,
out total int
) language plpgsql as
$$
begin
select json_agg(t order by t.version_number desc)
into resource
select
json_agg(t order by t.version_number desc),
(select count(a) from article a where a.version_id = _version_id)
into resource, total
from (
select
a.*,
@@ -10,8 +18,9 @@ begin
from article as a
where a.version_id = _version_id
order by a.version_number desc
limit "limit" offset "offset"
) as t;
end;
$$;
-- drop function if exists find_articles_versions_by_version_id(uuid, out json);
-- drop function if exists find_articles_versions_by_version_id(uuid, int, int, out json);

7
src/test/sql/article.sql
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@@ -7,6 +7,7 @@ declare
created_citizen json := '{"name": {"first_name":"George", "last_name":"MICHEL"}, "birthday": "2001-01-01"}';
created_article json := '{"version_id":"933b6a1b-50c9-42b6-989f-c02a57814ef9", "title": "Love the world", "anonymous": false, "content": "bla bal bla", "tags": ["love", "test"]}';
selected_article json;
selected_total int;
begin
-- insert user for context
select insert_user(created_user) into created_user;
@@ -29,14 +30,16 @@ begin
assert (created_article->>'version_number')::int = 2, format('version_number must be equal to 2, %s instead', created_article->>'version_number');
-- get articles versions by version_id
select find_articles_versions_by_version_id((created_article->>'version_id')::uuid) into selected_article;
select resource, total into selected_article, selected_total from find_articles_versions_by_version_id((created_article->>'version_id')::uuid);
assert selected_article#>>'{0,title}' = 'Love the world', format('title must be "Love the world", %s', selected_article#>>'{0,title}');
assert (selected_article#>>'{0,version_number}')::int = 2, format('version_id must be 2, %s instead', selected_article#>>'{0,version_number}');
assert selected_total = 2, format('the total must be 2, %s instead', selected_total);
-- get articles versions by id
select find_articles_versions_by_id((created_article->>'id')::uuid) into selected_article;
select resource, total into selected_article, selected_total from find_articles_versions_by_id((created_article->>'id')::uuid);
assert selected_article#>>'{0,title}' = 'Love the world', format('title must be "Love the world", %s', selected_article#>>'{0,title}');
assert (selected_article#>>'{0,version_number}')::int = 2, format('version_id must be 2, %s instead', selected_article#>>'{0,version_number}');
assert selected_total = 2, format('the total must be 2, %s instead', selected_total);
-- get article by id and check the title
select find_article_by_id((created_article->>'id')::uuid) into selected_article;