create_books =
<<EOS
CREATE TABLE Books (
- id INTEGER PRIMARY KEY,
- author INTEGER REFERENCES Authors(id),
- cover INTEGER,
- description TEXT,
- path VARCHAR(256),
- series INTEGER REFERENCES Series(id),
- title VARCHAR(196),
- volume VARCHAR(16)
+ id INTEGER PRIMARY KEY,
+ author INTEGER REFERENCES Authors(id),
+ classification INTEGER REFERENCES Classifications(id),
+ cover INTEGER,
+ description TEXT,
+ path VARCHAR(256),
+ series INTEGER REFERENCES Series(id),
+ title VARCHAR(256),
+ volume VARCHAR(16)
+ );
+EOS
+
+ create_classification =
+<<EOS
+ CREATE TABLE Classifications (
+ id INTEGER PRIMARY KEY,
+ ddc VARCHAR(32),
+ lcc VARCHAR(32),
+ author_grouping VARCHAR(64),
+ author_sort VARCHAR(128),
+ title_grouping VARCHAR(256),
+ title VARCHAR(256)
);
EOS
);
EOS
+ create_fast =
+<<EOS
+ CREATE TABLE FAST (
+ id VARCHAR(32) PRIMARY KEY,
+ descr VARCHAR(128)
+ );
+EOS
+
+ # Associative entity, linking FAST and Classifications tables
+ # in a 0..n to 0..m relationship
+ create_fast_classifications =
+<<EOS
+ CREATE TABLE FAST_Classifications (
+ fast VARCHAR(32) REFERENCES FAST(id),
+ classification INTEGER REFERENCES Classifications(id)
+ );
+EOS
+
create_series =
<<EOS
CREATE TABLE Series (
stmts = [
create_authors,
+ create_classification,
create_efs,
+ create_fast,
create_series,
create_books,
+ create_fast_classifications,
'CREATE SEQUENCE author_id;',
'CREATE SEQUENCE book_id;',
+ 'CREATE SEQUENCE classification_id;',
'CREATE SEQUENCE efs_id;',
'CREATE SEQUENCE series_id;'
]
@conn.exec(stmt)
end
+ populate_fast_table()
+ populate_classifications_table()
populate_series_table()
end
def dropSchema
stmts = [
'DROP TABLE Books;',
+ 'DROP TABLE FAST_Classifications;',
'DROP TABLE Authors;',
+ 'DROP TABLE Classifications;',
'DROP TABLE EFS;',
+ 'DROP TABLE FAST;',
'DROP TABLE Series;',
'DROP SEQUENCE author_id;',
'DROP SEQUENCE book_id;',
+ 'DROP SEQUENCE classification_id;',
'DROP SEQUENCE efs_id;',
'DROP SEQUENCE series_id;'
]
for stmt in stmts do
- @conn.exec(stmt)
+ begin
+ @conn.exec(stmt)
+ rescue Exception => exc
+ puts 'WARNING: "' + stmt + '" failed: ' + exc.to_s
+ end
end
end
def load_book(id)
#puts 'DEBUG: load_book(' + id + ')'
- sql = "SELECT author, cover, description, path, series, title, volume FROM Books WHERE id=$1;"
+ sql = "SELECT author, classification, cover, description, path, series, title, volume FROM Books WHERE id=$1;"
book = nil
begin
book = Book.new(self)
book.author = load_author(row['author'])
+ book.classification_id = row['classification']
book.cover = load_cover(row['cover'])
book.description = row['description']
book.path = row['path']
end
def store_book(book)
- sql = "INSERT INTO Books (id, author, cover, description, path, series, title, volume) VALUES ($1, $2, $3, $4, $5, $6, $7, $8);"
+ sql = "INSERT INTO Books (id, author, classification, cover, description, path, series, title, volume) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9);"
book_id = next_id('book_id')
author_id = store_author(book.author)
(efs_id, mime_type) = store_cover(book)
- args = [book_id, author_id, efs_id, book.description(), book.path(), book.series_id(), book.title(), book.volume()]
+ args = [book_id, author_id, book.classification_id, efs_id, book.description(), book.path(), book.series_id(), book.title(), book.volume()]
begin
rs = @conn.exec_params(sql, args)
return book_id
end
+ def find_classification(author_grouping, title_grouping)
+ #puts 'find_classification("' + author_grouping.inspect + '", "' + title_grouping.inspect + '")...'
+ sql = "SELECT id FROM Classifications WHERE author_grouping = $1 AND title_grouping = $2;"
+ @conn.exec_params(sql, [author_grouping, title_grouping]) do |rs|
+ if rs.ntuples > 0
+ #puts ' --> ' + rs[0]['id'].inspect
+ return rs[0]['id']
+ end
+ end
+ #puts ' --> NIL'
+ return nil
+ end
+
def load_cover(id)
if nil == id
return nil
return efs_id, mimetype
end
+ def exec_id_query(sql, args)
+ ids = []
+ @conn.exec_params(sql, args) do |rs|
+ rs.each do |row|
+ ids.push(row['id'])
+ end
+ end
+ return ids
+ end
+
+ def exec_update(sql, args)
+ begin
+ rs = @conn.exec_params(sql, args)
+ rescue Exception => e
+ puts sql + ": " + args.inspect()
+ puts e.message
+ puts $@
+ ensure
+ rs.clear if rs
+ end
+ end
+
def next_id(seq_name)
id = nil
@conn.exec("SELECT nextval('" + seq_name + "');") do |rs|
return nil
end
+ def populate_classifications_table
+ puts "Populating the Classifications table..."
+ first = true
+ CSV.foreach(@basepath + '/csv/class.csv') do |row|
+ if first
+ # skip the header row
+ first = false
+ else
+
+ # First, add a row to the Classifications table
+
+ id = next_id('classification_id')
+ ddc = row[0]
+ lcc = row[1]
+ author_grouping = row[2]
+ author_sort = row[3]
+ title_grouping = row[4]
+ title = row[5]
+
+ sqlInsert = "INSERT INTO Classifications (id, ddc, lcc, author_grouping, author_sort, title_grouping, title) VALUES ($1, $2, $3, $4, $5, $6, $7);"
+ args = [id, ddc, lcc, author_grouping, author_sort, title_grouping, title]
+ exec_update(sqlInsert, args)
+
+ # Second, link up with the appropriate FAST table entries
+
+ fast = []
+ input = row[6]
+ if input.length > 0
+ fast = input.split(';')
+ end
+
+ fast.each do |fast_id|
+ sqlInsert = "INSERT INTO FAST_Classifications (fast, classification) VALUES ($1, $2);"
+ args = [fast_id, id]
+ exec_update(sqlInsert, args)
+ end
+ end
+ end
+ end
+
+ def populate_fast_table
+ puts "Populating the FAST table..."
+ first = true
+ CSV.foreach(@basepath + '/csv/fast.csv') do |row|
+ if first
+ first = false # skip the header row
+ else
+ id = row[0]
+ descr = row[1]
+ sqlInsert = "INSERT INTO FAST (id, descr) VALUES ($1, $2);"
+ exec_update(sqlInsert, [id, descr])
+ end
+ end
+ end
+
def populate_series_table
puts "Populating the Series table..."
CSV.foreach(@basepath + '/csv/series.csv') do |row|
id = next_id('series_id')
sqlInsert = "INSERT INTO Series (id, age, genre, grouping, code, descr) VALUES ($1, $2, $3, $4, $5, $6);"
args = [id] + row
- begin
- # DEBUG: puts 'SQL> ' + sqlInsert + ': ' + args.inspect()
- rs = @conn.exec_params(sqlInsert, args)
- rescue Exception => e
- puts sqlInsert + ": " + args.inspect()
- puts e.message
- puts $@
- ensure
- rs.clear if rs
- end
+ exec_update(sqlInsert, args)
end
end
WHERE upper(a.grouping) LIKE $1
ORDER BY a.grouping, b.series, b.volume, b.title
EOS
- book_ids = []
- @conn.exec_params(sql, [pattern]) do |rs|
- rs.each do |row|
- book_ids.push(row['id'])
- end
- end
- return book_ids
+ return exec_id_query(sql, [pattern])
+ end
+
+ def query_books_by_ddc
+ sql =
+<<EOS
+ SELECT b.id FROM Classifications c
+ INNER JOIN Books b ON b.classification=c.id
+ ORDER BY c.ddc
+EOS
+ return exec_id_query(sql, [])
end
def query_books_by_series_id(id)
WHERE b.series = $1
ORDER BY b.volume,b.title
EOS
- book_ids = []
- @conn.exec_params(sql, [id]) do |rs|
- rs.each do |row|
- book_ids.push(row['id'])
- end
- end
- return book_ids
+ return exec_id_query(sql, [id])
end
def query_series_by_age(pattern)
WHERE s.age LIKE $1
ORDER BY s.grouping,s.descr
EOS
- series_ids = []
- @conn.exec_params(sql, [pattern]) do |rs|
- rs.each do |row|
- series_ids.push(row['id'])
- end
- end
- return series_ids
+ return exec_id_query(sql, [pattern])
end
end
projects / quanlib.git / blobdiff