Requisito complexo de relatório de atividade do usuário

Muito obrigado por isso!

O campo de perfil de usuário personalizado que estou tentando usar é ‘NZRAB number’

Tentei, com o script resultante abaixo, mas obviamente errei, pois isso gerou o erro ‘Função indefinida’

Não tinha certeza se o nome do campo deveria excluir letras maiúsculas ou espaços — o Editor não pareceu gostar do espaço no nome do campo, pelo menos, então substituí por um underscore

Também posso estar confundindo o nome do campo com o rótulo do campo — mas, se for o caso, não sei como descobrir qual nome de campo pertence ao rótulo ‘NZRAB number’

-- coverage: 'week', 'all', or 'date'
-- [params]
-- date :start_date = 2019-08-27
-- date :end_date = 2019-09-30
-- text :coverage = week

WITH date_range AS (
SELECT date_trunc('day', dd):: date AS "date", EXTRACT(week from date_trunc('day', dd):: date) AS "week"
FROM generate_series
        ( :start_date::timestamp 
        , :end_date::timestamp
        , '1 day'::interval) dd
), likes_given AS (
SELECT u.id, dr.date, dr.week, count(pa.*) AS "likes"
FROM date_range dr
FULL JOIN users u ON (1=1)
LEFT JOIN post_actions pa ON (pa.created_at:: date = dr.date and post_action_type_id=2 AND user_id = u.id)
GROUP BY dr.date, dr.week, u.id
ORDER BY u.id, dr.date
), posts_summary AS (
SELECT u.id, u.username, u.created_at, dr.*, count(p.id) - count(t.id) AS replies, count(t.id) AS topics, COALESCE(sum(p.like_count),0) AS likes_received, cf.value as NZRAB_number
from date_range dr
FULL OUTER JOIN users u ON (1=1)
LEFT JOIN posts p ON (p.user_id = u.id AND p.created_at::date=dr.date AND p.deleted_at IS NULL)
LEFT JOIN topics t ON (t.user_id = u.id AND t.created_at::date = dr.date AND p.topic_id = t.id AND t.deleted_at IS NULL)
LEFT JOIN user_custom_fields cf ON (u.id = cf.user_id and cf.name = 'NZRAB number') 
GROUP BY u.id, dr.date, dr.week
ORDER BY u.id, dr.date
)
SELECT ps.id, ps.username, ps.created_at, ps.NZRAB_number, CASE
WHEN :coverage::text = 'week' THEN ps.week::text
WHEN :coverage::text = 'all' THEN '-1'
ELSE ps.date::text
END  AS period, sum(ps.replies) AS replies, sum(ps.topics) AS topics, sum(ps.likes_received) AS likes_received, sum(lg.likes) AS likes_given, COALESCE(sum(posts_read),0) AS posts_read, COALESCE(sum(time_read),0) AS time_read, SUM(visits) AS visits
FROM posts_summary ps

LEFT JOIN likes_given lg ON (ps.date = lg.date AND ps.id = lg.id)
LEFT JOIN visits v ON (v.id = ps.id AND v.date = ps.date)
GROUP BY ps.id, ps.username, ps.created_at, CASE 
WHEN :coverage::text = 'week' THEN ps.week::text
WHEN :coverage::text = 'all' THEN '-1'
ELSE ps.date::text
END  
ORDER BY ps.id, CASE
WHEN :coverage::text = 'week' THEN ps.week::text
WHEN :coverage::text = 'all' THEN '-1'
ELSE ps.date::text
END

erro resultante:

PG::UndefinedFunction: ERROR: operator does not exist: integer == integer
LINE 32: LEFT JOIN user_custom_fields cf ON (u.id == cf.user_id and c…
^
HINT: No operator matches the given name and argument types. You might need to add explicit type casts.

Se você concluiu disso que não faço a menor ideia do que estou fazendo, estaria certo!

Consegui obter um exemplo funcional a partir do seu código.

-- coverage: 'week', 'all' ou 'date'
-- [params]
-- date :start_date = 2019-08-27
-- date :end_date = 2019-09-30
-- text :coverage = week

WITH date_range AS (
SELECT date_trunc('day', dd):: date AS "date", EXTRACT(week from date_trunc('day', dd):: date) AS "week"
FROM generate_series
        ( :start_date::timestamp 
        , :end_date::timestamp
        , '1 day'::interval) dd
), likes_given AS (
SELECT u.id, dr.date, dr.week, count(pa.*) AS "likes"
FROM date_range dr
FULL JOIN users u ON (1=1)
LEFT JOIN post_actions pa ON (pa.created_at:: date = dr.date and post_action_type_id=2 AND user_id = u.id)
GROUP BY dr.date, dr.week, u.id
ORDER BY u.id, dr.date
), posts_summary AS (
SELECT u.id, u.username, u.created_at, dr.*, count(p.id) - count(t.id) AS replies, count(t.id) AS topics, COALESCE(sum(p.like_count),0) AS likes_received, cf.value as nzrab_number
from date_range dr
FULL OUTER JOIN users u ON (1=1)
LEFT JOIN posts p ON (p.user_id = u.id AND p.created_at::date=dr.date AND p.deleted_at IS NULL)
LEFT JOIN topics t ON (t.user_id = u.id AND t.created_at::date = dr.date AND p.topic_id = t.id AND t.deleted_at IS NULL)
LEFT JOIN user_custom_fields cf ON (u.id = cf.user_id and cf.name = CONCAT('user_field_', (select id::text from user_fields where name='NZRAB number'))) 
GROUP BY u.id, dr.date, dr.week, cf.value
ORDER BY u.id, dr.date
)

SELECT ps.id, ps.username, ps.created_at, ps.NZRAB_number, CASE
WHEN :coverage::text = 'week' THEN ps.week::text
WHEN :coverage::text = 'all' THEN '-1'
ELSE ps.date::text
END  AS period, sum(ps.replies) AS replies, sum(ps.topics) AS topics, sum(ps.likes_received) AS likes_received, sum(lg.likes) AS likes_given
FROM posts_summary ps
LEFT JOIN likes_given lg ON (ps.date = lg.date AND ps.id = lg.id)
GROUP BY ps.id, ps.username, ps.created_at, ps.nzrab_number, CASE 
WHEN :coverage::text = 'week' THEN ps.week::text
WHEN :coverage::text = 'all' THEN '-1'
ELSE ps.date::text
END  
ORDER BY ps.id, CASE
WHEN :coverage::text = 'week' THEN ps.week::text
WHEN :coverage::text = 'all' THEN '-1'
ELSE ps.date::text
END

Observação: a relação em user_custom_fields é um pouco estranha. Se não funcionar, talvez seja necessário executar uma consulta separada para determinar o nome correto a ser usado:

Em uma consulta separada, execute:

select * from user_custom_fields

Encontre um registro no conjunto de resultados que corresponda ao seu campo “NZRAB number” e verifique o nome. No meu caso, era “user_field_2”.

Depois de obter esse valor, substitua esta linha na consulta acima:

LEFT JOIN user_custom_fields cf ON (u.id = cf.user_id and cf.name = CONCAT('user_field_', (select id::text from user_fields where name='NZRAB number'))) 

por

LEFT JOIN user_custom_fields cf ON (u.id = cf.user_id and cf.name = <SEU_NOME_DE_CAMPO>)

Espero que você não precise fazer isso.

Ótimo — funcionou perfeitamente para mim, exatamente como está!

Para testar minha sorte, é tecnicamente possível contar separadamente as postagens que receberam curtidas e aquelas que não receberam?

A razão da minha pergunta é que, caso contrário, não há como saber se alguém que recebeu 8 curtidas as recebeu todas em uma única postagem ou se elas foram distribuídas entre várias postagens.

A outra pergunta é: existe uma maneira de restringir a saída apenas às pessoas cujo campo personalizado NZRAB_number esteja entre dois números fornecidos pelo usuário? (excluindo os cadastros que inseriram texto ou deixaram esse campo em branco)

E também: é possível exibir o nome real do usuário ao lado do seu ID?