forked from ScoDoc/ScoDoc
53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
# -*- coding: UTF-8 -*
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"""
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Create some Postgresql sequences and functions used by ScoDoc
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using raw SQL
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"""
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from app import db
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def create_database_functions():
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"""Create specific SQL functions and sequences"""
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# Important: toujours utiliser IF NOT EXISTS
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# car cette fonction peut être appelée plusieurs fois sur la même db
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db.session.execute(
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"""
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CREATE SEQUENCE IF NOT EXISTS notes_idgen_fcod;
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CREATE OR REPLACE FUNCTION notes_newid_fcod() RETURNS TEXT
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AS $$ SELECT 'FCOD' || to_char(nextval('notes_idgen_fcod'), 'FM999999999'); $$
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LANGUAGE SQL;
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CREATE OR REPLACE FUNCTION notes_newid_ucod() RETURNS TEXT
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AS $$ SELECT 'UCOD' || to_char(nextval('notes_idgen_fcod'), 'FM999999999'); $$
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LANGUAGE SQL;
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CREATE OR REPLACE FUNCTION truncate_tables(username IN VARCHAR) RETURNS void AS $$
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DECLARE
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statements CURSOR FOR
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SELECT tablename FROM pg_tables
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WHERE tableowner = username AND schemaname = 'public'
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AND tablename <> 'notes_semestres'
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AND tablename <> 'notes_form_modalites';
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BEGIN
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FOR stmt IN statements LOOP
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EXECUTE 'TRUNCATE TABLE ' || quote_ident(stmt.tablename) || ' CASCADE;';
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END LOOP;
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END;
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$$ LANGUAGE plpgsql;
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-- Fonction pour anonymisation:
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-- inspirée par https://www.simononsoftware.com/random-string-in-postgresql/
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CREATE OR REPLACE FUNCTION random_text_md5( integer ) returns text
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LANGUAGE SQL
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AS $$
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select upper( substring( (SELECT string_agg(md5(random()::TEXT), '')
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FROM generate_series(
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1,
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CEIL($1 / 32.)::integer)
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), 1, $1) );
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$$;
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"""
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)
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db.session.commit()
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