2 * Renderer for Roo Database code
4 * - Concept - this code does the SQL queries
5 * pulls data from information_schema (on mysql only at present..)
6 * Sends it down the line to the Javascript code. to generate structures
10 // should this be in palete...
14 public class RooDatabase : Object
16 public Project.Project project;
21 public Gda.Connection cnc;
23 public RooDatabase.from_project (Project.Project project)
25 this.project = project;
26 this.DBTYPE = this.project.get_string_member("DBTYPE");
27 this.DBNAME = this.project.get_string_member("DBNAME");
30 this.cnc = Gda.Connection.open_from_string (
32 "DB_NAME=" + this.DBNAME,
33 "USERNAME=" + this.project.get_string_member("DBUSERNAME") +
34 ";PASSWORD=" + this.project.get_string_member("DBPASSWORD"),
35 Gda.ConnectionOptions.NONE
37 } catch(Gda.ConfigError e) {
38 print("%s\n", e.message);
41 } catch(Gda.ConnectionError e) {
42 print("%s\n", e.message);
49 public RooDatabase.from_cfg (string dbtype, string dbname, string dbuser, string dbpass)
54 this.cnc = Gda.Connection.open_from_string (
57 "USERNAME=" + dbuser +
58 ";PASSWORD=" + dbpass,
59 Gda.ConnectionOptions.NONE
61 } catch(Gda.ConfigError e) {
64 } catch(Gda.ConnectionError e) {
73 public Json.Array readTables()
76 if (this.DBTYPE == "PostgreSQL") {
78 return this.fetchAll(this.cnc.execute_select_command(
79 """select c.relname FROM pg_catalog.pg_class c
80 LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
81 WHERE c.relkind IN ('r','') AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
82 AND pg_catalog.pg_table_is_visible(c.oid)
86 if (this.DBTYPE == "MySQL") {
87 return this.fetchAll(this.cnc.execute_select_command( "SHOW TABLES" ));
89 return new Json.Array();
92 public Gee.ArrayList readTablesGee()
94 var ret = new Gee.ArrayList<string>();
95 var ar = this.readTables();
96 for(var i = 0; i < ar.get_length(); i++) {
97 ret.add(ar.get_string_element(i));
103 public Json.Object readTable(string tablename)
107 var res = new Json.Object();
109 switch (this.DBTYPE ) {
112 res_ar = this.fetchAll(this.cnc.execute_select_command(
119 CASE WHEN f.attnotnull = 't' THEN 'NO' ELSE 'YES' END AS isNull,
120 pg_catalog.format_type(f.atttypid,f.atttypmod) AS Type,
121 CASE WHEN p.contype = 'p' THEN 't' ELSE 'f' END AS primarykey,
122 CASE WHEN p.contype = 'u' THEN 't' ELSE 'f' END AS uniquekey,
123 CASE WHEN p.contype = 'f' THEN g.relname END AS foreignkey,
124 CASE WHEN p.contype = 'f' THEN p.confkey END AS foreignkey_fieldnum,
125 CASE WHEN p.contype = 'f' THEN g.relname END AS foreignkey,
126 CASE WHEN p.contype = 'f' THEN p.conkey END AS foreignkey_connnum,
127 CASE WHEN f.atthasdef = 't' THEN d.adsrc END AS default
128 FROM pg_attribute f JOIN pg_class c ON c.oid = f.attrelid
129 JOIN pg_type t ON t.oid = f.atttypid
130 LEFT JOIN pg_attrdef d ON d.adrelid = c.oid AND d.adnum = f.attnum
131 LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
132 LEFT JOIN pg_constraint p ON p.conrelid = c.oid AND f.attnum = ANY ( p.conkey )
133 LEFT JOIN pg_class AS g ON p.confrelid = g.oid
134 WHERE c.relkind = 'r'::char AND n.nspname = 'public'
135 AND c.relname = '""" + tablename + """' AND f.attnum > 0 ORDER BY number;
141 res_ar = this.fetchAll(this.cnc.execute_select_command( "DESCRIBE " + tablename ));
149 for (var i =0; i < res_ar.get_length(); i++) {
150 var el = res_ar.get_object_element(i);
151 res.set_object_member( el.get_string_member("Field"), el);
162 public Json.Object readForeignKeys(string table)
166 var ret = this.readTable(table);
167 // technically we should use FK stuff in mysql, but for the momemnt use my hacky FK()
168 if (this.DBTYPE != "MySQL") {
176 information_schema.TABLES
178 TABLE_NAME = '""" + table + """'
180 TABLE_SCHEMA = '""" + this.DBNAME + """'
183 var jarr = this.fetchAll(this.cnc.execute_select_command(
186 if (jarr.get_length() < 1) {
190 var contents = jarr.get_string_element(0);
192 GLib.Regex exp = /FK\(([^\)]+)\)/;
196 if ( exp.match (contents, 0, out mi) ) {
199 print("match = %s", str);
201 } catch (GLib.Error e) {
204 var ar = str.split("\n");
205 for (var i = 0; i < ar.length; i++) {
206 var kv = ar[i].split("=");
207 if (!ret.has_member(kv[0].strip())) {
210 var o = ret.get_object_member(kv[0].strip());
212 //o.set_string_member("key", kv[0].strip());
213 var lr = kv[1].split(":");
214 o.set_string_member("relates_to_table", lr[0].strip());
215 o.set_string_member("relates_to_col", lr[1].strip());
216 o.set_object_member("relates_to_schema", this.readTable(lr[0].strip()));
217 //ret.set_object_member(kv[0].strip(),o);
224 public Json.Array fetchAll(Gda.DataModel qnr)
226 var cols = new Gee.ArrayList<string>();
228 for (var i =0;i < qnr.get_n_columns(); i++) {
229 cols.add(qnr.get_column_name(i));
231 //print(Json.stringify(cols, null,4));
232 var iter = qnr.create_iter();
233 var res = new Json.Array();
234 //print("ROWS %d\n", qnr.get_n_rows());
236 for (var r = 0; r < qnr.get_n_rows(); r++) {
240 //print("COLS %d\n", cols.size);
241 if (cols.size == 1) {
242 var str = qnr.get_value_at(0,r).get_string();
243 //print("GOT %s\n",str);
244 res.add_string_element(qnr.get_value_at(0,r).get_string());
248 var add = new Json.Object();
250 for (var i = 0; i < cols.size; i++) {
252 var val = qnr.get_value_at(i,r);
253 var type = val.type().name();
254 //print("%s\n",type);
258 add.set_string_member(n, "?? big string ??");
262 add.set_null_member(n);
266 add.set_string_member(n, val.get_string());
272 res.add_object_element(add);
285 // valac --pkg libgda-5.0 --pkg gee-1.0 --pkg json-glib-1.0 --pkg libxml-2.0 RooDatabase.vala -o /tmp/rdtest
288 var x = new JsRender.RooDatabase.from_cfg("MySQL", "hydra", "root", "");
289 // var res = x.readTables();
290 //var res= x.readTable("Person");
291 var res= x.readForeignKeys("Person");
293 var generator = new Json.Generator ();
294 var root = new Json.Node(Json.NodeType.OBJECT);
295 root.init_object(res);
296 generator.set_root (root);
298 generator.pretty = true;
299 generator.indent = 4;
302 print("%s\n", generator.to_data (null));