pythondatabasesqlitegenie

Creating a table in an SQLite database with Genie?


I am trying to create a database using Genie code. However, I am facing problems with documentation, so I am asking here!

This can be considered unintuitive, because I could run SQLite directly on command line and create the dataset. I am doing this way for didatic reasons.

The code I am trying to mimic in Python is:

#--------------------------------------
import apsw
#--------------------------------------
# Opening/creating database. Database name is cookbook.db3
connection=apsw.Connection("cookbook.db3")
cursor=connection.cursor()
#--------------------------------------
# Create The Tables
#--------------------------------------
sql = 'CREATE TABLE Recipes (pkiD INTEGER PRIMARY KEY, name TEXT, servings TEXT, source TEXT)'
cursor.execute(sql)
sql = 'CREATE TABLE Instructions (pkID INTEGER PRIMARY KEY, instructions TEXT, recipeID NUMERIC)'
cursor.execute(sql)
sql = 'CREATE TABLE Ingredients (pkID INTEGER PRIMARY KEY, ingredients TEXT, recipeID NUMERIC)'
cursor.execute(sql)
#--------------------------------------
# Insert Data into tables
#--------------------------------------
# Insert data into Recipe table
sql = 'INSERT INTO Recipes (name,servings,source) VALUES ("Spanish Rice",4,"Greg")'
cursor.execute(sql)
# Get the pkid for the inserted record
sql = "SELECT last_insert_rowid()"
cursor.execute(sql)
for x in cursor.execute(sql):
    lastid = x[0]
# Insert data into the instructions table
sql = 'INSERT INTO Instructions (recipeID,instructions) VALUES( %s,"Brown hamburger. Stir in all other ingredients. Bring to a boil. Stir. Lower to simmer. Cover and cook for 20 minutes or until all liquid is absorbed.")' % lastid
cursor.execute(sql)
# Insert data into the ingredients table
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 cup parboiled Rice (uncooked)")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 pound Hamburger")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"2 cups Water")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 8 oz can Tomato Sauce")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 small Onion chopped")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 clove Garlic chopped")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 tablespoon Ground Cumin")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 teaspoon Ground Oregano")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"Salt and Pepper to taste")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"Salsa to taste")' % lastid
cursor.execute(sql)
# Put in one more for good "measure"
sql = 'INSERT INTO Recipes (name,servings,source) VALUES ("Pickled Pepper-Onion Relish","9 half pints","Complete Guide to Home Canning")'
cursor.execute(sql)
# Get the pkid for the inserted record
sql = "SELECT last_insert_rowid()"
cursor.execute(sql)
for x in cursor.execute(sql):
    lastid = x[0]
sql = 'INSERT INTO Instructions (recipeID,instructions) VALUES( %s,"Wash and chop vegetables. Combine all ingredients and boil gently until mixture thickens and volume is reduced by 1/2 (about 30 minutes). Fill sterile jars with hot relish, leaving 1/2 inch head space and seal tightly. Store in refrigerator and use within one month or process in boiling water bath if extended storage is desired. Hot pack process time at 0-1000 feet for 5 minutes, 1,001 to 6000 ft 10 minutes, above 6,000 ft 15 minutes.")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"6 cups finely chopped Onions")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"3 cups finely chopped Red Peppers")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"3 cups finely chopped Green Peppers")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"1 1/2 cups sugar")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"6 cups White Vinegar (5 percent)")' % lastid
cursor.execute(sql)
sql = 'INSERT INTO Ingredients (recipeID,ingredients) VALUES ( %s,"2 tablespoons canning or pickling salt")' % lastid
cursor.execute(sql)
# Tell us we are done
print 'Done'

I have learned how to use vala.doc, and I found the routine to manipulate SQLite databases: SQLite.Database. However, I keep getting an error on compilation.

This is how far I got on reproducing that code:

/* HOW TO CREATE THE DB WITH GENIE */

// Opening/creating db. 

[indent=4]
init
    Sqlite.Database db
    string errmsg
    
    int ec = Sqlite.Database.open("cookbook.db", out db)
    if ec != Sqlite.OK
        stderr.printf("Can't open database: %d: Ss\n", db.errcode(), db.errmesg)
        return -1
        
    // Insert data
    query:string ="""
        CREATE TABLE Recipes (pkiD INTEGER PRIMARY KEY, name TEXT, servings TEXT, source TEXT)
        """
    db.exec (query, null, out errmsg)
    

It was suposed to insert tables into a database, but I am getting the following error:

    valac --pkg sqlite3 cookcreate.gs 
cookcreate.gs:9.11-9.11: error: syntax error, expected `:' but got `.' with previous identifier
    Sqlite.Database db
          ^
Compilation failed: 1 error(s), 0 warning(s)

Solution

  • It looks as though you have used the example in Valadoc, but not converted the type information from Vala syntax to Genie syntax. So Sqlite.Database db would be db:Sqlite.Database.

    A working example in Genie would be:

    [indent=4]
    init
        db:Sqlite.Database   
        errmsg:string
    
        ec:int = Sqlite.Database.open("cookbook.sqlite", out db)
        if ec != Sqlite.OK
            stderr.printf("Can't open database: %d: %s\n", db.errcode(), db.errmsg())
            Process.exit( -1 )
    
        query:string ="""CREATE TABLE Recipes (
            pkiD INTEGER PRIMARY KEY, 
            name TEXT,
            servings TEXT, 
            source TEXT 
            )
        """
        db.exec (query, null, out errmsg)
    

    A couple of things to note: